Several were offered, most notably:
1 - apples and oranges comparison of tank damage against healer/dps damage. Comparing damage across roles is a terrible idea and should not in any way govern balance decisions.
2 - the game, as designed right now, is completely clearable. This means the content we have in game has been designed with the current dps/mitigation/healing issues in mind.
3 - arbitrarily boosting the dps of a given job won't make fights go faster. Tying into point 2, content is built around certain expected dps levels. Boosting dps just means the content hp gets boosted accordingly.
4 - tank balance right now is the best it has ever been. Just small tweaks - if any really - are needed, and at most we're looking at small adjustments to potencies or perhaps duration on some things (example: increasing Blood Weapon duration to 11s to make it so hitting the 5th hit is much easier due to the client-server bullshit that happens with BW). Screwing with this balance, even if it's an equal % increase across all the tanks, will throw that balance out the window, since some tanks will gain more from that boost and others will gain less. Furthermore, as gear gets better (i.e. crit scales better) you're going to see the damage rankings for tanks get shaken up. Throwing a blanket dps % increase into the mix will really screw things up.
Those are the ones I remember, without going back and reading each page of this thread again anyway. Most responses to this have been a variation of "but muh deeps" couched in a bunch of bafflegarble about relative dps numbers, as if that means a damn thing considering how the content is built around it.
I can understand "it feels bad" but please understand that "it feels bad" is also selfish. Content is clearable well within margins of error right now with things the way they are. Asking for more dps simply because "it feels bad" is not a reason to throw job balance on the line. The jobs are all balanced for the content in the game right now. Fights are being cleared in about the same amount of time as they were in the last raid tier. Without the presence of an outside dps meter, there's no way anyone would know that they are dealing less % damage, because the entirety of the game is designed to be beaten with things the way they are now.
So while yes I do understand "it feels bad," it's ultimately a stupid, selfish reason. Not to say you yourself are stupid, but that this reasoning is stupid. Wanting bigger numbers simply because you want bigger numbers is stupid when it would come at the cost of what is arguably the most balanced the tanks have ever been. Furthermore, as others have noted in this post, comparing across roles is a bad idea in general, and not something that should be used as a metric for balancing damage, so using that as an argument is disingenuous at best and actively malicious at worst.