Yea if a framework makes breaking changes to the point where you can't upgrade your app, that seems like it could be a recurring problem so after the first rewrite you might as well learn native code and write it there.
Disagreed, the vast majority of business problems with tech are solved with some form of CRUD which frameworks are perfect for. If your framework all of a sudden doesn't support your business needs either you didn't plan ahead well or your business simply outgrew it, which can happen once a business becomes complex enough.
Virtually nobody in software is incentivized to look at long term software costs. Startups need to move fast, project managers move on, devs need to keep their skills up to date to keep flipping jobs, and managers would need to become technical.
