How about we change the "dps check" a little?

[Hezzlocks]

Siri, what are tankbusters in general?
How about Aggro resets?
Almagest?
White Hole?
Charybdis?
Photon especially when combined with Eternal Darkness?
Missile?
Allagan Field?
Shinryu's dragon heads?
Akh Morn?
Death Sentence + Plummet?
Heartless Angel/Heartless Archangel?
Practically every single Prey mechanic?

How many more examples do you want?

None of those are soft enrages. They're basic mechanics you deal with in the fight, and for the most part someone dieing to them is not a raid wipe, at least not an assured wipe. You seem to be confusing this with mechanical understanding. A soft enrage is something that builds up in intensity to the point where it becomes overwhelming, requiring the tanks and healers, and even the DPS if they had defensive cooldowns in FF14, to give it their everything to last as long as possible until either the phase ends, the boss dies, or the raid wipes. Susano's sword is one of the closest things to this for a tank, yet even that is still, in the end, just another DPS check.

Really, there are generally only two things that wipes groups. Either people not dodging things and being killed off, or the DPS check failing. Because of this, healers only ever heal as much as they need to, and tanks always gear for maximum DPS. If there were more fights that had more unpredictable unavoidable damage, or much higher constant damage, while also having an ever so slightly looser hard enrage time, then this wouldn't be the case.

You can often separate fights into a few different categories. DPS check, where the enrage timer is extremely tight and/or there are things that must die *immediately*, endurance fights, where incoming damage is usually wild and random and trying to survive is more important than dealing damage, and mechanical understanding, where the fight is more about performing mechanics correctly than anything else, but may be combined with a moderate version of dps or endurance fights. FF14 has plenty of the DPS checks, nearly every fight is tight enough that DPS needs to be on point to clear. There are some mechanical understanding fights. There's not many endurance fights.