Having an opportunity to respec on a whim feels like having an access to a debug room.
This is something I'm agnostic on. I'll admit I probably did abuse respec-ing in Pathfinder WotR, but on the other hand it was my first playthrough and I don't really know the system so the alternative would have been living with some mistakes I'd made constantly being annoyed I'd not made a different choice, or reloading from way, way earlier in the game. I definitely see respecing as the lesser of those evils. Though I wish WotR had given me an additional option to just relevel rather than completely redesign my character, as after the first retry I was happy with them at level 1 and it was tedious having to do the whole character creation again every time. Though I suppose it was a bit of a disincentive to respecing, so perhaps it was intended.
I'll wait and see how BG3 handles it. It's not a feature I'd probably be clamouring for if it weren't there, but on the other hand I find it hard to see having the opportunity to fix mistakes as a bad thing, especially in single player and while I get to grips with the ruleset.
I am all in for the respect system that allows you to fix mistakes, but only within the classes, races, and backgrounds you've committed to. Pathfinder WotR is a game that does not go an extra mile to immerse you into the world like BG3 does with all these cinematics and dialogue reactivity and unique identity. Thats why I think for WotR it is less harmful to have the full respec than for BG3.