Right, but then you are glueing things together and mixing and trying to match CSS so they all play together. AirDatepicker here, tomselect there, datatables here, popper there. All of sudden you lost a lot of time trying to make things look like one cohesive unit, when you should be doing your app.
Meanwhile, I have v0 generate the whole skeleton for me, with composable reusable components, and just got the API done.