I'm on your side.

Nobody can point to a reason why it's a good idea for a site with any interactivity now.

All the supporters here are all the same: "I had to do a whole bunch of mental gymnastics and compromises to get <basic server side site feature> but it's worth it!" But they don't say why it was worth it, beyond "it's easy now <after lots of work costs sunk>".

When you try get to why they did it in the first place, it's universally some variation on "I got fed up with <some large server side package> so took the nuclear SSG route <and then had to eventually rewrite or get someone else's servers involved again>"

Part of this is a me problem: a personal website should be owned by the person, IMO. A lot of people are fine to let other people own parts of their personal websites, and SSGs encourage that. What even is a personal website if it's a theme that looks like someone else's, hosted and owned on someone else's server - why not just use Facebook at that point?!