Then I guess this is the trade-off you've agreed to. However, there are a whole lot of Linux and potential Linux users who complain about the lack of proprietary software ports, and package managers and their implications are one of the reasons for that.

Flatpak isn't even good enough, in my opinion, since it adds complexity to an otherwise simple scheme in an effort to accomplish some of the deduplication you and other fans of package managers want. Ditto its repo model.