Just because you have never personally seen a bug occur doesn't mean it isn't a problem.

This very article is about how Tailscale frequently gets reports of them being hidden.

And I personally have had the icons hidden. My work laptop has a lot of stuff running on it (much of it is mandatory: VPN, custom company processes, Google Drive, etc) and combined with my personal preferred programs (f.lux, etc) it occasionally hits the limit and goes under the notch.