The legal threats were credible and resulted in yet more wasted developer time removing that package instead of the entire useless repo.
You're forgetting that millions of Steam Deck consoles have been sold and all of them are flathub exclusive.
On top of that you have: Mint, Vanilla OS, Endless OS, OpenMandriva, PopOS!, Clear Linux, PureOS, ZorinOS, KDE Neon, GNOME OS, Salix, and many others all shipping flathub by default.
Fedora is in a very exclusive group of distros dumb enough to ship their own flatpak repo.
Bringing up Distrowatch stats and "Echo chamber" in the same comment is the most absurd thing I've seen this year.