All the arguments stem from the assumption that personal projects have the same uptime, scaling, and deployment requirements as some large commercial site. Some personal projects might but I'd argue most of those are really commercial in the sense that you're developing them for a portfolio or the like. They're not personal.
It makes sense to use business tools like kubernetes when you're making a demo business site. It doesn't make it a good platform for personal projects.
The best platform for those is hosting from home on a single computer, for free, with total control. ie, personal.