I'm not insanely deep into frontend, I mostly just pick up React and call it a day, but it seems like this is also over-engineered?

I've seen vanilla JS before, and I just know I wouldn't want to do the housekeeping that comes with it. People claim it's less work because it' simpler, but I fully expect myself to rewrite the thing at least twice, only to give up because I have no actual mental model anymore of how it works.

I have never in my career encountered a Vanilla JS project of at least medium size that I would have called simple. They all feature brittle selfmade frameworks whose developers have since left the company years ago.