[munificent]

Insiders can reform things too, but they tend to do so less often from a combination of:

1. Since they have already learned the old way, they are less personally incentivized to improve the path. It's in their past anyway, so it's a sunk cost. Also, they may have some (conscious or not) incentive to keep things the way they are in order to leverage their existing expertise in the current system.

2. Once you've internalized a system, it's much harder to even see it's flaws. Like navigating your living room, you just walk around the furniture completely on auto-pilot without even thinking, "Maybe I should move this chair out of the way." If you've ever done any UX research, it leaves a striking impression about how users often know and do things without consciously knowing they are doing them. Outsiders and new users to a system still see it for what it is.

The peak time to improve a system is when you understand it just well enough to see its flaws and how to fix them but not so well that you've forgotten the pain points. Any given user is in that liminal state for only a small amount of time, so it's precious and it's good to make the most of it.