It’s definitely partially academia that does this. When you are a grad student you are paid so poorly and worked so hard it is difficult to build a substantial identity outside of being an academic. Academia is good at marketing itself as a noble cause that imbues very high status if you can ever “make it” so quiting is giving up on that lofty dream. Where in industry it is definitely “not cool” if you build your identity around your job. That creates a helpful firewall that pushes people to develop something outside their work.