I’m supportive of some of these views. I would say it differently though
If a company sells a 3d printer and their own filament they are implicitly trying to create an ecosystem. They should be compatible out of the box so that it is an ecosystem.
When customizations have to be made to make it work, it is a failed ecosystem which means it’s not delivering value. You might as well buy a different brands filament.
Vote with your feet, sales will drop due to feedback until it’s been fixed or the filament is dropped. PETG-CF does seem to have a relatively higher amount of complaints vs PLA for example.
I think one the bigger issues is what is a filament setting vs what is a “process” setting. Should cooling for overhangs at be process or filament? What about infill using a crossing or non crossing infill? Seeems like some filaments need certain process settings to print well