Edit: as check wikipedia to see what he has worked on I see there is a section about a controversy and I realize the parent post may mean something about a moral characteristic of Joss Whedon, not his capability as a creator.

> Joss Whedon, who arguably shouldn't speak at all

Please argue. Isn't he a succesfull writer/director/showrunner?

Seems like he is one of the people able to "making the archetypes of blockbuster films into fun, likable people" (the core argument of the article), as evidenced by the fan following of Buffy, success of the first Avengers movie, etc.

It is possible, if not likely, that the failings of one or more of his projects are not his fault (as we have evidence he is able to make fun things to watch)