You are exactly right that the underlying premise is a dislike of Musk, who has famously made mistakes, I too am critical of all of the things you listed.

So, if a very contentious personality is involved, is there any purpose or value in pointing out seriously flawed assumptions/POV/rationale?

Another example is the excessive divisiveness in politics, what would make discussions around those topics better? In my opinion, it would be better to rein in serious factual errors, even if the errors skew towards "my side"