First no one asks for 123 standarized but having more stuff to do, there are cooldown, dots, buff, basically job interactions cause thats what make the jobs fun
Second is not about easy, is about engaging gameplay but some people seem to be either really lacking on reading comprehension or outright trolling cause that has been said multiple times
Third what you said about weaving and tanks is simply false, lets see the tanks case:
War
As we can see fell cleaver which is out of the main combo is the most used action and tanks to the branching paths one of its 3s is even below an ogcd, we can see also how no action goes above 6 in the cpm so there is variety in what they do
Pld
This case is even better as atonement is also out of the main combo and its the most used action, the combo finishers only appear at the 5th and 9th spot on top of that no action goes above 5 in cpm so there is also variety of what they do
...Now lets see healers (again)
Big off, the most used action is glare which is the 1, something that did not happen with tanks even tough they have 1-2-3 combos, the first heal appears at 3rd spot with only 8 casts which talks a lot about how much healing was required and the glare has a cpm of 19.5 out of 30.7 so over half of the total actions they do were pressing that single button
But you said it, its a Whm thing so maybe Sge is better:
...or not, dosis still comes as the most used action, the most used heal was used 10 times and is the 3rd most used action (not gonna count eukrasia) and the cpm for dosis is 19.5 out of 33 so is what the sage did the majority of the fight
Dps actions are not the solution to every problem, but after seeing that there is no way someone would say they need more stuff no matter what, but a single button with those high cpms that has zero depth does not scream healthy precisely