I brought this up before, but here it is again:
"More than anything, Smash Bros. is a competitive action game."-
www.smashbros.com
Emphasis on the competitive.
The assumption here is that sakurai, as well as his development team will make the game catered to the demographic of the previous two titles.
However, this statement doesn't really have much ground. Just because the majority of the people who buy the game do not go to tourneys or use advanced techniques does not necessitate their removal or their neglect.
There isn't any evidence brought up that shows that sakurai intends brawl to be a "casual" game.
In fact, the efforts to increase depth and speed in melee could be seen as a push towards competitive gaming, which could be replicated in brawl, since the two have the same developer.
So f you want to argue that sakurai does not care about the competitve gamer, you will have to show that he only cares about the majority of the people who buy his game.