Comment by kccqzy

In my experience it's because the companies have not hired any persons whose job is to triage bug reports. People do find bugs all the time, and making it super frictionless to report bugs will result in a deluge of reports. Some reports will be outright spam, some could be mistaking a feature for a bug, some could be duplicates. Someone needs to do the triage and try to reproduce before the issue is forwarded to developers. Few companies have the role of Quality Test Engineer (QTE) to do this job; most don't so they have no means to triage the bug reports.

The only exception is indie apps I pay for on the App Store. There is usually only one or perhaps two people behind it, so by definition that person is SWE, QTE, PM and several jobs rolled into one. And this is unsustainable unless the app is paid.