I think the reason OP listed "sexism, slutshaming" separately is because they're separate issues. The downvotes are coming from your erroneous conflation of the two (and possibly being perceived as purposeful conflation to strawman the argument).
That said, I think the slutshaming you pointed out is just as damaging as what's going on in Wu's case. Who gives a shit if @sexyengineer is wearing a speedo in all of his tutorials? The point is the information and if he's not sharing bad info I don't see the problem other than the fact that you and I have differences in taste.
Don't have a problem with that phrase in a vacuum but in context of this discussion I find it highly problematic. Who decides the standard? Which standards actually matter?
I guess I see information (esp with regards to video tutorials/demos) as agnostic. If you're reading a tutorial online, there's no telling whether the person who wrote it was completely naked while doing so. Does the information change simply because you thought they should at least throw a robe on before trying to share info? As long as she's sharing good info, I don't see why it matters what she's wearing. And no, I cannot see what issue other people have other than a difference in taste (which, again, has no bearing whatsoever on whether what she's sharing is factual and helpful or not...).
That said, I think the slutshaming you pointed out is just as damaging as what's going on in Wu's case. Who gives a shit if @sexyengineer is wearing a speedo in all of his tutorials? The point is the information and if he's not sharing bad info I don't see the problem other than the fact that you and I have differences in taste.
I.e., don't yuck in other people's yum :)