The “too big” meme has been pushed by the internet’s own Ted Holden (a.k.a. Medved, and a number of other FR nicks, banned one by one, other than his current one) and suffers from starting with a conclusion and cherry picking (very little) data in support of it.
The idea of the largest dinos having to stand in water to support their overgrown bulk went out with the “bees can’t fly” meme.
Heresy in the sciences is a good thing, because — like Ted Holden — scientists pay lip service to testability, logic, etc, but many need to spend a couple of bucks and get bumperstickers that read, “my professor said, I believe it, and that settles it”.
Not just a good thing, but it's an absolutely essential component of expanding our understanding of the universe.