Because at it's core that's what the series is, you can get into details but ultimately those are the basic elements of the story wrap it around in chinese folklore and there you have it. I'm going to put on a pedestal and say it's something that it's not.
The beauty of dragonball is not in it's core it's in the details. All arcs have fairly different plot lines that happen to have a story and something interesting going on. But at the core it's generic.
Again with the money bag rhetoric? If their goal was to money bag they wouldn't have made it in the first place.
Yes it is an adaptation I can't believe you're still clinging to that.
Webster: something that is adapted; specifically: a composition rewritten into a new form
Funny isn't that what this movie is?
Congratulations you just described shounen, which is exactly what dragonball falls under.
What this is is an alternate telling it's not like the setting of dragonball is so rigid it can't be told in a different way. Also how will taking the name dragonball attract more money? do you not realize the financial gamble they're making with this? unlike spider man and superman whose fan base is larger then people who aren't fans. Dragonball has a very minor fan base in the west. Non-fans clearly out number the fans. if putting dragonball was their way of generating more money someone needs to go ahead and fire their marketing division.
Again the fan bases of Spiderman, X-Men and Iron man are a lot larger then the dragonball fan base so tampering with those core elements is financial suicide. Furthermore those series have all had various different authors at one point so fans are use to alternate telling's.
I really hate to get analytical, but, if you insist...
Ok... so...
Your points seem to be:
1) The fanbase of DBZ isn't that big, so their opinions don't matter in the face of making money.
I don't even want to get into how messed up that one is.
2) Once again, you don't think Shounen in general can be anything like complex; You have a lack of respect for the genre in general.
That's your problem, and all it makes it seem like is that you don't think this criticism is necessary because you don't respect the genre, despite insisting your a fan. Thus, it seems less like you have any real opinions on why the criticism is undeserved and more because you don't think it deserves to be respected the way a good adaptation would.
3) They wouldn't be making the movie if it wasn't a money grab.
Yeah... that's my point. Money grabs tend to be low quality attempt to make quick money off of an established source.
4) Dragonball is generic.
That I halfway agree with. Dragonball Z got more and more repetitive as Toriyama took up the story again and again at the request of the ones who ran the comic, but, as you said, was still very good anyway. Dragonball (before DBZ), didn't really have the same problem, since he was given more control; the plot was much more spontaneous and, well, wacky.
DB and DBZ isn't the greatest thing ever written, far from it, but that doesn't mean it doesn't deserve a good adaptation. It doesn't have as much complexity as some others, but that doesn't mean it doesn't have any substance.
5) You can boil it down to a hero fighting an antagonist, with magic balls thrown in.
I grabbed this from one of your older posts, but I had to say something because it was such a particularly bad definition (both of the show itself, and bad definition in principle). It's technically correct, but a poor definition and needlessly simple. It's technically correct, but actually says nothing.
To you, setting means nothing? Effort in creating characters and plotlines means nothing? The only thing that matters is the bare minimum, and anything else is just addition that contributes nothing to the core? If that's all you consider fictional works to be, then it's no wonder you don't think a bad adaptation means anything.
Any and every book, show, comic, manga, etc, can be boiled to a single sentence that, while accurately by necessity, is so needlessly simple that it doesn't actually explain a thing.
6) An adaptation inherently a change to the original. Any adaptation is thus acceptable.
Ok, after countering this a few times, I'm just going to state it simply. A good adaptation makes it's own changes the plots and tweaks the characters, but keeps the basic spirit of not just the premise, but the plot and the characters themselves. The moment an adaptation starts messing with the the essence of it's source, then it's becomes bad. Your main problem seems to be that you don't think the source in this case has any substance.
You keep going back to assuming the people you're talking about want a 100% true adaptation, which is impossible to get. We all know that. That doesn't mean people should satisfied with anything that has the name.
TVTropes has a couple pretty good names for the type of movie this is going to turn out to be:
In Name Only and
Dolled Up Installment.