I would agree with you in this about snaps IF snap were somewhere close to production level software.
Nobody can assemble some new kind of app packaging, slowing the starting speed to 5-10 seconds and call that "good rounded software"
"It is just a couple of seconds more sometimes, not a big deal" isn't going to cut it. Most of the Internet using Ubuntu, already knows that.
I think Canonical is again in denial.
It already happened a couple of times: MIR, Unity (buried by not being community driven probably), Unity8, the mobile project or something, all but forgotten now.
This snap thing is probable the pet project from a couple top guys in Canonical. Maybe hundreds of powerpoint presentations have been watched about some "big strategy" for the next years, but they didn't know the thing (snap) is unbearable slow.