If I may attempt a rebuttal then: It's about Sakurai being a fanboy (hard to stop that) and Nintendo themselves marking FE as a major point of focus and trying to turn the series into a flagship (hard to stop that too).
That's not my opinion, it's what I'm assuming. My opinion on the matter is mixed - I'd prefer if the love was a bit more spread yes, but I'm not gonna be fussed about it in the end.
I'm kinda interested to see how 3 Houses does when it's officially released in China. Sure, imports don't look to be too high there at the moment, but China has a really big anime fanbase (one of the biggest video sites there is a haven for anime). Of course, it'll likely be a factor of how big the Switch gets there (there's no official data on how big it is after Day 1).
I can't argue with those points, but perhaps I was unclear in my post. It's not about
why the character was chosen, I think people understand the reasoning that went into it, it's about trying to write-off peoples' issues with FE on the basis of the chronic oversight regarding all the other series which have just as much to offer.
It's about reducing everything to haters and saltiness when, although those blunt, malicious people obviously exist, the problem some people have is the disproportionate treatment. Even if it's understood why it's happening, I think it's hard to discredit the dissatisfaction that stems from how relatively equal series receive disparate treatment within Smash. And the more disparate it becomes, the more some people find it difficult to reconcile.
It's not a simple indictment of the series itself, (I can't speak for everyone, but I certainly have no problem with FE as a series - I don't play every game but I do enjoy those that I play, including 3H), nor does the argument inherently stem from bias: someone not receiving their specific character, which are the strawmen that usually get addressed when this concern is broached.
As to my earlier analogy, it's like one employee getting frequent raises when so many others also deserve a promotion. As to your point, it isn't to say that that one employee doesn't deserve it, but the resentment that might percolate from other worthwhile employees repeatedly failing to get recognized despite comparable performance is, in my opinion, completely understandable and difficult to refute.
Were it, for example, DK with the eight characters instead, I'm sure many people would have exactly the same concerns. I certainly would, despite also enjoying the DK games.