It's common for PMs and product designers to move company after about 3 years.
Many of the apps I use have been around for more than a decade now.
That means I've likely been using them for significantly longer than the people who are making design decisions about them!
Changes that are "obviously bad" to me - based on my very specific patterns of using the app over a ten year period - may not be at all intuitively bad to the team working on it.