Yeah, I know a lot of indie artists. Most of that vinyl is produced straight off the 44.1/16 digital master. If you think it's analog (or in many cases even properly mastered at all), you're fooling yourself.
The "loudness war" issue is not inherent to digital sources. Nor is it something you need to "master the record out of". It's sufficient to not break it in the first place.
>44.1/16 digital
This is already way beyond what vinyl is able to reproduce. The best case is roughly 12-bits PCM equivalent. Literally not an issue in the slightest.