Putting others down doesn't help. If you know more than others, the thing to do is to share some of what you know, so the rest of us can learn. Then you're addressing the underlying ignorance as well as contributing to the ecosystem, instead of poisoning it further.
It's not a put down to say that there are people without knowledge of Lichess's operations or infrastructure. I'm one of those people. I don't presume to have any knowledge of effective cost cutting measures. Others do.
I understand the temptation to do this—we all feel it. That's why that guideline is in there. Such comments reliably lead to lower-quality threads, because they don't add anything that anyone can learn from. They just assert the commenter as somehow different from / better than others.
That's not to say the comments you were criticizing aren't bad. Of course, shallow dismissals are bad. But it only makes things worse to respond with a different sort of shallow dismissal.
https://hn.algolia.com/?dateRange=all&page=0&prefix=true&sor...
https://news.ycombinator.com/newsguidelines.html