I seriously dislike adding a package source for a single application. It feels dirty to me. I can't explain it but it makes me feel like I need to take a shower.

I don't use arch but this looks cleaner than whatever Debian or fedora (both of which I use) have going on

https://tailscale.com/kb/1036/install-arch

Alternatively, I feel much better when the upstream vendor is the one packaging and signing the software I install, instead of a (possibly malicious) volunteer from my distro's repository team.