I think you answered your own question when you mentioned Angular being an "all in one".
Angular needs a bit more training because you are heavily encouraged to do things the "Angular" way which requires a lot of abstraction and componentization.
I was more referring to the essentially mandatory third party packages that you need with react, react router, redux/whatever you please, something for your styles, something for forms etc. With angular you just use what comes out of the box, but either way you have to learn whatever the thing is so the effort seems to be the same. Not sure what you mean about abstraction and componentisation vs other frameworks.
