It depends what you mean by “better solutions”. Yes, higher level abstractions can lead to better solutions but it very much depends on you choosing the right abstraction; if you choose the wrong one then your solution will be worse. You do need to understand how the abstractions work to be able to choose the right one and avoid the wrong ones, and to know when no abstraction does what you need and it is better to do it yourself.
I think it is something like driving a car. Yes, you can drive a car without knowing how it works but you will never become a good driver if you don’t know how it works. And I am not talking about driving fast here.
