I had a living-room media server for many years. My recommendation: Don't put a media server in your living room.
Instead, get a tiny, quiet, privacy-respecting client (e.g. Apple TV) and put the media on a NAS that lives elsewhere. Depending on your preferred client UX, you may (Plex) or may not (Infuse) need a separate app to serve the media.
Whether the server lives in your living room or office/homelab doesn't really matter in terms of its effect on the popularity of "self-hosting". If anything, local media library management is likely to become less popular, and any "Trojan horse" effect has happened by now since people have been doing this for a couple of decades.
So yeah, I'm very keen for something plug and play in this space.
I have a repo that uses a Harbormaster (a Comppse-based deployment tool I wrote, https://harbormaster.readthedocs.io/) to set everything up and keep it up to date, so all you need to do is run the Harbormaster container, point it to the above repo config, and the apps will run. Then, you just need to configure each app, but the directories will be set up properly.
It's a bit of work, but probably not as intimidating as it sounds.
You can use Plex as a DLNA server together with a DLNA client (like players built into most TVs), so Direct Play and Direct Streaming should work just the same.
Anyways, in my country it's legal to download for personal use.