You still seem to think that non-label studios inevitably have to produce garbage.
It just isn't true. Nobody is talking about bands slapping something together in their garage, complete with the sound of traffic driving by.
But no matter what the labels would like to claim, it doesn't cost millions of dollars to build and operate a good studio. $30,000-50,000 (well within the cost of a home improvement loan) is enough to design and build a kick-ass studio. And $5,000-10,000 is enough to hire a competent engineer (but without a billion-dollar reputation) for the few days needed to do the final recording/mixing of an album. There is no need for an expensive engineer while you're rehearsing.
There are also plenty of independent studios that you can rent time (and even an engineer) from, if you don't have the money to build one in your own home. And again, you don't need an expensive studio for rehearsals.
The results of this kind of production can be every bit as good as what a studio puts out, and it doesn't leave the band massively in debt and without any rights to their own compositions.
I've purchased many such albums, and the production quality is every bit as good as what the major labels put out.
Yes, nobody is going to pay full price for an album that was slapped together in someone's bedroom, but if you think the only possible alternative is a label-sponsored studio that costs millions of dollars to operate, you're fooling yourself.