Well you need both.
What some people do not understand, is that you need to know your class / optimal rotation. When people know their classes and their limitation its not that hard just to concentrate on the mechanics.
Imagine a musician, who has a melody in his mind, but just doesn't have the trained technique to let that melody out on an instrument. The frustration of not being able to do what you imagined. But after he learns and trains on an instrument he can play (almost) whatever pops in his mind.
What some people think, is that they are able to play in a band in some grand concert, without learning the instrument or songs. It just doesn't go that way.
And like in a song, there are battles, where you like some parts, or don't like. But you need to satisfy a certain requirements in all parts if you want to play in a band. If you don't want to practice, get better, you get replaced by someone who wants.
That is the truth behind all this.
Players that do not want to practice got the option to get the 110 gear.
In 2.4 Titan Ex will not be required anymore for other primals.
Echo buff that makes things laughable on the top of the higher ilvl gear.
Now with all that, you want to redesign the fights, by eliminating the only danger that bypasses the already overpowered gear. Its already like a cheat, now you want a god mode.
Put some effort in it and claim your deserved loot.
If people used half of the time they use on the forums, to actually learn and train their classes, research videos and guides, this thread would not be 93 pages long.
The only thing that i think is really valuable here, is the discussion of balancing the rope-jumping, rng mechanics, and different checks (dps, awareness, heal). But still some fights will have more of one, some other more of other, which is what makes them different.
Sorry for the rant, but i hope some people at least understand that fights have different components and you need to meet the minimum requirement of everyone of them.
By lowering the minimum requirement, you don't solve the problem. Just more people would ask for more lowering and so on till people can just faceroll the content.
Which is already the case when you can 4 man titan hm.