10 min doesn't seem tenable over 24/7. Most likely you need to run errands and so on. In my team, our alerts aren't that critical, I just acknowledge on the phone and make sure I can get to the computer with 30 mn. I take it with me if needed.

No, for me, the real pain with oncall is that there are a lot of systems in my team. I understand well maybe 30% of it. I'm clueless about 30%. In between for the rest. I can try to fix issues myself (take long time, issues can add up), triage (but means bothering someone else). There are also things than nobody understand, and if they break, it can mean extra days of work for you with extra-stress because you don't know how hard it can be to fix.

Then, some people in the team ship code without adequate testing, because of pressure to ship. Which often adds work to the oncall. So there's all this extra tensions with colleagues which can be hard to deal with for an introvert.

Overall, it "kind of" works for us, but I agree with the conclusion, it sucks. It's really the worst part of my job. I went into software engineering because I like coding. Not because I liked monitor unreliable systems. And I think unreliability is encouraged by management to some extent. That keeps people at work.