I guess the #1 reason to run Nomad on your home server is "because you're interested in it". Which is also probably the #1 reason to run a home server to begin with, for most people.

Also, while I don't wanna dispute the effectiveness of it, you should evaluate if "just running nginx from your distro repos" is fine under your threat model when you start exposing stuff to the internet or start introducing services that handle personal information.