My guess at the stance is I’d imagine it’s that switching away from snaps is switching away from Ubuntu’s support and security monitoring and updates to some less known/reliable/diligent third party?

Popey (Alan Pope) used to work for Canonical / Ubuntu, so he’s presumably not inclined to jump on the bandwagon of Canonical/Ubuntu/snap hate since he knows a lot of Canonical and Ubuntu people and their motivations and work. Not that there aren’t good reasons to criticize snap or other Canonical decisions, but it’s also plain that a lot of people just join a hate bandwagon and don’t even know what about it they object to. There is masses of wrong-headed criticism of Canonical out there e.g. I’ve frequently seen people criticize creating Upstart, saying Canonical should have used systemd, or bzr vs git! Presumably these people were annoyed at Canonical for not inventing a time machine.