False.
Ruby Weapon part 2 has a full fight dps check. Very lenient one, but it has an actual hard enrage. I got to see it plenty of times in my trial roulettes around 5.2.
A huge amount of the Hard mode trials from Ramuh+ have a dps check in the form of an add phase, where you must kill everything before a gauge fills to 100, or adds dont die and its effectively a wipe due to vulns.
Ramuh (must kill adds or auto wipe)
Shiva (must kill adds or auto wipe)
Steps of Faith: need I say more about the controversy surrounding the instance and why it was nerfed?
Ravana (must kill adds or Bloody fuller becomes unlivable due to vulns)
Bismark (hard enrage if snake adds dont die, or if fight drags on long enough for island to shatter from Bismark's attacks)
Thordan (Knight phase will auto wipe if it hits 100 due to player deaths, or if it drags on for too long due to the gauge slowly increasing over time)
Nidhogg (adds must die or auto wipe)
All three warring triad (adds must die or auto wipe)
And that's just the HW hard mode trials, not extreme. Every single SB trial sans lakshmi has the 'adds must die or wipe' clause, as do about half of the SHB ones. Just because they're lax doesn't mean they're not dps checks. Dps checks are everywhere in FF14, in all difficulties. There's even a dps check in the 83 dungeon. Every HW+ alliance raid also has a dps check in some way or another. Dun Scaith first boss has an actual hard enrage when the entire ship is covered in doom squares, making it impossible to dodge his death IV cast.
Titania was insanely notorious for this because hers was actually tight for the skill level of the average FF14 player, leading to tons of add phase wipes in the DF. And before they added echo so you can brute force it with enough wipes, you'd more often than not either have to decide to keep throwing yourself at it in the hopes people would stop dying/that SMN doing HW level damage would suddenly get a clue, or take the 30min penalty.