I think the people doing the rewrites genuinely believe it will be an improvement, and they could be correct. I get the instinct to “don’t fix what ain’t broken”, but that is what staging is for. There is no need to make sacred cows, and this seems like a perfect opportunity to improve security and integration testing as well.

FYI that sounds like ADHD to me. Not something to act on unless it becomes a problem, but I wish my parents would have recognized it when I was struggling.