I used Ubuntu at work a couple of years ago. When they announced the switch to snaps I didn’t really care, but when they switched Firefox to the snap version it had quite a few issues like really slow startup, inconsistent theming, and problems with some extensions. So I uninstalled the snap, installed the standard DEB and went on with my work.
But then the issues came back, and it took me some time to figure out they had replaced the actual DEB package with an unholy shim which just installed the snap. THAT really pissed me off, so when I got a new laptop I just installed Arch and my only regret was not doing it sooner.
The point is also to minimize potential damages caused by a bug in the software. Just this year there have been multiple data-destroying bugs in publicly released software. If the app runs as a server it’s usually trivial to have it run as a dedicated user, with just enough permissions to do its job.
It’s just good practice, even though the risks might be low why risk it at all?