You can arrange snapd to update on your preferred schedule. What you cannot do is defer updates forever.
Says who? AFAIK the person who paid my hardware (me) is who is in command.
At the same time, it's also perfectly valid to instead, express what you want and don't want, and generally try to fix something that has broken or correct the aim of something that has veered off course.
Approving of the new change is also valid for that matter.
The only invalid thing is telling whichever camp you're not in that they can leave if they don't like it.
Remember, this is a change, not just the way something has always been.
How about, if you like the idea of everything packaged in the form of snaps, and all those snaps updating themselves outside of your control, you can just go find, or create, some new distro that works that way, instead of changing one that already exists and forcing all it's existing users to either accept the change or move, to accomodate a change you like?
"Take it or leave it" are not the only options, and it says something unflattering about anyone who tries to suggest that they are.