So I use a host vpn on my firewall/router to remotely access my server (I have never used tailscale but I think it does the same thing, right?). With nginx+DNS registar+SSL cert you would not need to host a vpn you could could acess it like other website. The use case for example is for non-tech savi remote family members who do not understand vpns or networking, they wouldn't have to fiddle with ovpn or wg files, or more accurately you wouldnt need to have to try to walk them through it over the phone. Your server services would work like any other website/app they are used to. Secondly there are some apps that I've found that https is a requirement.