He's trolling or genuinely believes the nonsense he is spewing, the guy isn't even level 70 so he's just got nothing to do but troll, best to put it on ignore, you won't get any sense out of replying to it. He's jealous and bitter, can't adapt to the meta of tank damage and has never tanked anything high level in his life without echo or nerfs, hence the spite against those who want to push themselves. Guy literally doesn't exist in any raid logs and is still level 60, so this only confirms it.
The FFXIV forums get a bad rep a lot of the time, this guy is a prime example of terrible advice & a terrible attitude, a great example of what NOT to be when trying to progress your skill in a game, posting more on the forums then actually getting good in game. o/