As someone looking in from the outside, the problem is with the way UE5 markets itself, (people using UE5 can correct me). The appeal of UE5 is that it does all the boring stuff for you. For example, instead of buying a good light system off of your engine's marketplace or making your own you can just use lumen. Any system marketed as something you can "just use" is going to get implemented wrong because its appeal is supposed to be that it is low effort.

^(no shame to devs that do think like this, game development is hard and having solutions like this just gives more time to make the game you want)^