Not caring about the details leaves us with people who can't fix simple issues and with applications that use way too much cpu, memory or energy than they really should. Sure, a lot of people don't care and just want to do the thing, but if you at all care that your computer that is 1000x as powerful as the one you had years ago, but doesn't really do a lot more, then you have to care. If you care about the users of your application and don't simply pass your lower development effort on to them in terms of performance cost, then you have to care. If you want to be able to fix your own issues, then you have to care.

Yes, the abstractions mean people can do more without caring, which in turn means more people can use them, but it comes at a cost too.