That's actually addressed in this video - he interviews the main maintainer in the last segment. The issue was Fedora announcing they want to retract support for 32 bit libraries eventually, and that sparking fear in the community, because some apps like the Steam client would be affected. As it looks as per the interview, to quote the maintainer: "Bazzite is not going anywhere". The Fedora maintainers took comments to heart (in fact, their announcement was to get feedback from the community), and critical libraries for certain applications will remain maintained, until apps like Steam and OBS and such can switch to 64-bit architectures.

But don't feel bad for thinking otherwise - in the interview, the Bazzite maintainer laments how many outlets used the announcement to fearmonger, so that was a widespread sentiment. Sensationalism, anxiety and outrage tactics to get clicks, basically.