That they don't care wouldn't be my take, but it may be true for some.

It is true it is hard to get the incentives right, especially if your goal is to make things that don't get abandoned.

They do a lot of experimentation though, trying to see what works.

I think "what works" and "what users want" are two similar, intersecting but not at all identical sets. Some users like new and broken, others want things that will never work.

I am curious what kind of people do you try to hire, and what do you screen for? I mainly just try to gauge someone's experience in the field, and ability to to fit a specific role. (I have mostly been involved in Android app dev or related interviews).

I ask things like "how do you solve this common problem". A goal for me is to try to give basically the same interview over and over again, to make it easier to compare candidates. But over the years it changes of course.