this game relies too much on instant death attacks to make endgame harder

[Alhanelem]

*IMPORTANT IMPORTANT IMPORTANT*
This thread is NOT to QQ about beating Titan (or any specific mob in particular). Please do NOT post stuff like "oh are you bad or something?". This thread is about discussing a specific game mechanic. If you can't wrap your mind around that, then please, don't post.
*IMPORTANT IMPORTANT IMPORTANT*

now, I understand the primal fights are totally scripted and memorizing the attack patterns and stuff is key, but I feel like too many of the bosses in this game (at all levels) rely too much on the threat of instant guaranteed death to make things hard. Titan for instance, still wouldn't be a walk in the park if you didn't have the bombs do instant death, dps race to avoid instant death, falling to instant (and unrecoverable) death, because he just doles out a ton of damage even without these things. Garuda, Ifrit, and many dungeon bosses all have a "do XYZ thing or you unavoidably die instantly" mechanic.

FFXI didn't really overuse instant death attacks. even the most dangerous attacks could often be survived with enough HP / DR / etc.

This isn't meant as a QQ, but more looking for other's opinions on this issue: Do you think instant death moves are a cheap way to increase difficulty? Or do you think they have their place and there is no problem?

I don't completely mind its existence, I just think it's overused. I think that it is getting picked whenever a dev goes "oh, this isn't hard enough, how can we make it harder?" I'm not complaining that the mechanic exists, only that it seems to be the first thing the devs of many games jump to these days when they can't think of anything else.