Surely is relevant when the person is commenting on the experience of something when they've never experienced it.
I'm all for dogs on the internet but no point in accepting dogs commenting on the life of cats whilst strongly giving the impression that they too are cats.
I understand the annoyance, but the problem is that we don't have access to anything like the precision necessary to make such calls well on the internet. There is (vastly) too little information, too many opportunities to get it wrong, and the damage caused by getting it wrong is too great to be worth the risk. Therefore it's the better part of valour just to not go there.
Even getting it right doesn't help, because it will encourage other people to pull the same stunt themselves, get it wrong, and cause damage. We just need to not go there as a community.
I'm all for dogs on the internet but no point in accepting dogs commenting on the life of cats whilst strongly giving the impression that they too are cats.