This ignores human nature: requiring people to make a decision, any decision, is a friction point that will lose users. Something like "we'd like to increment a counter when our app crashes, we won't log anything else than that single bit".
So first of all, you'll have people who will claim that you could be lying, and they'll opt out, or not install your app, or whatever. Fine. But now all the people who truly didn't and don't actually care will have to make a decision. And making choices takes effort. So some people will just refuse to make a choice, and you'll lose users.
Consider the other side of this: I'm from the US but currently in Europe. GDPR requires explicit consent for the various trackers, it has defaults. I don't change them. I don't want to think about them. I don't care enough. And it's just effort I have to expend before I actually get to the stuff I'm interested in. Like a government mandated paywall (think the "we use cookies..." but more extreme, with checkboxes to decide which cookies they can store).
Even as someone who truly actually doesn't care, and is happy to, in the abstract, give explicit consent to all the tracking these sites do, I don't want to have to explicitly consent, because its work to do something I don't care about.
I expect, though I'm by no means certain, that most people who aren't on HN are in that bucket. And that means that requiring explicit consent for otherwise innocuous things is just bad for business with little gain, and it numbs people for explicit consent on actually important things.