That's not true anymore. I've heard about complains about badly compressed vinyl releases by indie artists. Just a few days ago I came across a comment on discogs.com about this issue: https://www.discogs.com/release/37244526-April-VISTA-Traditi...

The issue is that vinyl mastering is a special case and different from digital mastering. You have to consider extra things like the width of the grooves, they can vary depending on the runtime of a side, this affects low frequencies as grooves might cut into each other and you'll get skips. And high frequencies degrade the closer you get towards the center of the record. I just think the people who can do this craft are simply retiring or dying out. This affects major label and indie artists alike.

This is mostly the result of a lot of vinyl factories having shut down due to vinyl becoming mostly irrelevant after the release of more convenient formats like the CD. At least irrelevant enough to make factories unsustainable. Most modern vinyls have extremely bad quality, I'd even go as far and say almost all freshly produced vinyls. Source: I've worked in a high end luxury HiFi store for years prior to getting into tech, selling turn tables, tube amps, speakers and basically whatever you can think off in that space.