It's not "way too much work" to make them fine thread, it's minutes, just run a fine tap through the holes, whamo, done.
HOWEVER
I don't think that would be a good thing to do. If it were a stereo mount, heck yeah, not a big deal. But a door, oh no, you do NOT want to do that as it will weaken the mounting point. The threads will never be the same.
Just change the bolts and get on with life.
To change them correctly to fine WOULD be way way, WAY too much work and it's not worth it by any means. Most every door I have ever pulled up to right now on 2017 cars the bolts are course thread. Why they did those fine back then, I don't know, but it most certainly doesn't need to be fine thread.
Just change the bolts and get on with life.
Brian