Earlier quoted context omitted.
I don't think they were suggesting that. More something along the lines of "you're likely to be killing animals either way, so just accept that nature is cruel and don't feel guilty about it". There's a wide spectrum of how much you're willing to do to avoid causing suffering: - Nothing, eat meat from the worst factory farms without second thought - Only eat meat from local, ethical, sustainable, etc farmers. - Only…
It's kind of bad either way tbh. Imagine going to the funeral for someone else's mother and saying something to the tune of "The old hag was going to die anyway, so don't be sad". Telling people that their principles or feelings are wrong is rarely a great way to convince people, it just makes you look obnoxious in debates.
On the second point, I agree, if in person I wouldn't make such a statement in that way because reactions are immediate and you're within immediate awkwardness. But on the internet, you read a statement and then you will emotionally react, but can then go research more, ponder, deliberate and choose whether you respond emotionally, matter-of-factly, not at all, etc. I think that's great and in a sense encourages some more provocative honesty that we dance around in the flesh.