First of all, if you have a mesh you don't have to connect to home server to talk to other devices in the same network. They connect to each other.

Second it's super easy to add a new device. Managing wireguard keys is annoying.

Third I don't have to open the port, worry about ddns etc.

Finally, for me it allows me to manage my DNS easily and I can leave tailscale running at all times. Also good luck implementing ACL on your own.

I don't see an issue with them logging when I connect to my stuff. The convenience for me is worth it more than the risk.