The selling point is that it is immutable, not that it uses snaps (which it does). Fedora does the same thing with Silverblue and IoT. You don't install rpms, you install flatpaks. You can install rpms, but you're not really meant to.
Since Canonical refuses to get onboard with flatpak (for now) they use snaps instead of debs, but snaps aren't the direct appeal.
The whole idea is that you have a core system in a known configuration. Updating the system just means using a different image. If an update fails, then you just roll back to the last good configuration. Bazzite uses this to nice effect too.
There are a lot of advantages to end users and enterprise admins with systems in this configuration.
I think it depends. If your mortgage payment is $1000 and you're renting the space for $500 then you and your tenant are both sharing the financial burden, and I don't really see it as parasitism like lots of other people.
If you're renting for $1,200 then yeah everyone is going to hate you, no matter how few tenants you have. Even more so if that's your only source of income. Why should someone else be living your paycheck to your paycheck?