I try to read all dialogue, but a lot of the time it's pointless crap. I fail to see need to read everything, when I do, which is a lot of the time, I find myself thinking, why did I bother.
It's completely fine if you skip all, or read all.
Some people want a story, some people want to play a game. If you judge someone on whether they skip or read all, you are the problem.
I like a mix of story and gameplay, so I completely understand why people skip a lot of the dialogue, because there is more of that when levelling, and so far in Endwalker, I've barely killed anything, it's just story (still like it).
For people who are after gameplay only, they have to go through a lot to get to the fun end game of gameplay.