This is what really annoys me. For certain there will be people at g noticing this constant bouncing about so that some pointless product manager can get their promotion and bonus. They are noticing the damage this does to them. And it's even possible they are highlighting it. But they are completely unable to do anything about it.
Bingo. This is the reason. The higherups that approve promos are mostly tech-illiterate, so if you're a manager that oversees maintenance/fix work that isn't new and shiny and sexy and dressed up with marketing, you're never getting promoted and neither are your reports.