I guess we can agree to disagree then.
I don't find min-maxing even leveling dungeons at all dull, once there are tool sufficient for there to be a difference in my gameplay and the total time taken between them. There's opportunity, and roughly proportionate reward, and therefore there is a manageable challenge to it.
The fact that that min-maxing isn't made necessary by fatal punishment doesn't take away from its opportunities for engagement. Inversely, something that provides no challenge to the player beyond the basest means is still going to be dull, no matter the pressure placed upon it. Any duty that, to you, "would be boring if not for the pressure placed upon you" is something I wouldn't start if I knew such was the case, would despise completing, and would leave the moment my actions weren't placing others at risk, never to do it again. It would high pressure, and it would be painfully dull. To me, those two things can be simultaneous. If I have to force myself engaged, rather than the gameplay itself engaging me, that's boring -- no matter how well I might accomplish its job for it. You don't stick 6 players in an empty desert and say that the desert itself wasn't dull just because the players found out they could enjoy talking to each other... in the complete absence of anything else to do.
A competitive match in Overwatch or SC2, etc. can be duller than a non-ranked one if there are fewer opportunities to actually do something, to outplay in macro or micro. Stakes alone do not engagement make. Nor does the possibility of time wasted. That's just an extreme level of sunk cost fallacy at play if one comes to think so.
Again, I'm not saying that tanking in XIV is dull, to me, at least. Neither do I find it particular high-pressure. But no amount of pressure is necessarily going to make it less boring. You can be bored while being frazzled and stressed out. Their not mutual exclusives. So if someone does find XIV tanking to be both dull and too pressured... so be it.