The /snap directory is such a ridiculous wart. I really like snaps but they should be unobtrusive, or at least configure-able.
The reason that "classically confined" snaps don't work on Fedora out of the box and don't work on Fedora Silverblue at all is because of this wart. Fedora's snapd uses an alternate path because /snap is not allowed. This means that /snap path doesn't exist, but it also means that "normal" snaps work fine on all Fedora variants, since it doesn't require an FHS hierarchy mutation.
If there is no confinement, what advantages do "classically confined" snaps offer over AppImages?
By comparison, a strictly confined snap only has access to its own data directory and possibly to some configuration files or the users home directory, depending on which permissions it’s been granted.
A text editor which is most useful if it can edit arbitrary files in the filesystem could be classically confined.
A music player might be strictly confined with access only to external devices (and maybe users home directory).
A fishy untrustworthy crypto miner could be strictly confined with no additional permissions so it can only see/touch its own data.