If I apt install an app, I expect it NOT to be a snap. I want it to use shared libraries, not bring its own along. They hide from you that they are installing the snap not deb package.
Then you run into all sorts of permissions issues accessing the filesystem from the snap app… Because snap is rather broken in this regard.
Functionally snap is a worse solution then deb, but I guess it’s easier on the developer/maintainer as you don’t get lost in shared dependincy hell.
I feel snaps should be an option if you need cutting edge version of a software that can’t use your shared libs, but never the default install method.