Sure, so here is a challenge for you.

Original file:

a = 1

Contributor X:

a = 5

Contributor Y:

a = 0

Both contributors created a pull request and submitted it. In the description they both state that the new value should be the one they put it. How would you resolve this issue in a timely fashion making sure you do not take down a service accidentally and do not slow down development too much. I intentionally gave you a very simple example but if you want we can go into rolling out new features, fixing security bugs and a lot more where such issues arise. And, no git will never be able to solve these issues.

I don't think that HN going nuts (except few zealots) and these problems come from the nature of software development in general. We have seen how Google solves these (monorepo, custom CI/CD, etc. etc.) and there are other companies solving it different ways (maybe have a branching model, using Github). People are just putting out here they experience and based on that and they level of understanding the perceived solutions.