Contraception is not perfect. If you are on birth control, and you take it every day, you can still get pregnant, it’s just unlikely. If you have an IUD, you can still get pregnant, and even worse every pregnancy is more likely to be life threatening. And of course, condoms can break.
As for having less sex … that’s an interesting thing to say …
I was in a position like this once. The first two or three months were great. TBH, I mostly played video games and cleaned the house. It felt like free money. By the six month mark, I quit to go to something else. It’s surprising how mentally draining it is to just do nothing.
I think I took two things away from that experience: One, I think people generally have an innate need to produce something. We don’t want to just sit around and entertain ourselves, we want to contribute. Two, I think the 40 hour work week isn’t quite the right balance. Maybe 30 would be better.