Proprietary software is also really dogmatic. Steve Jobs famously didn’t support flash on the iPhone, there also was no direct access to files/file system in the UI for a very long time. Tim Cook told someone’s Mom to just buy an iPhone to access iMessage. There’s too many user hostile dogmatic positions from Apple.

I think this has nothing to do with open source vs proprietary, but rather specific individuals having power/control over the software to force specific decisions.