This is old, but it should give you an insight of how deep this goes:
https://www.stereophile.com/content/mqa-and-warner-real-scoop
Isn't supply chain control one of the things MQA promises? I can see why Warner would sign.
You know, some of the reason that modern music is as popular as it is is because it can be readily copied. Gave a lot of access to people who had no means (regional income too low, no regional dealers) to pay for it legitimately, even if they wanted to. True for tape especially, and then digital media later on.
Taking the long view, the MQA hardware restrictions will be defeated and made available cheap through an add on box or the like, maybe some sort of emulation. In the short them they'll generate a lot of revenue given how people are consuming content these days. So I understand it.
In the early 2000s a lot of solo artists released music through free netlabels. Some still do but not many. I think there's been a shift over to using platforms for digital distribution rather than have labels to bear that cost. Those netlabel releases out of practicality were only made available on MP3. Some with quality as low as 96kbps because of server costs and so on. That's the only form in which that music is floating around now. Kind of sad. But then not really. At least you have the record.
The early media, like wax cylinders, were commercial releases from the outset. Back then they were competing against instrument makers and people singing and playing at home or going out. And radio too.
Not just new music .... Warner replaced much of their back catalog on Tidal with MQA and removed the original versions. If they had left the original versions up I would not have an issue but they didn't so I moved to Qobuz.
They are definitely exerting force, legal and otherwise, on access. MQA seems to have given them the means to do so through the supply chain model.
I keep coming back to what will happen to this in a decade or two. I'd rather have everything in WAV, or FLAC, personally. But with multichannel and immersive content being developed and there being serious storage and bandwidth issues because of the amount of channels, especially in streaming, I don't see compression disappearing (and FLAC is limited to 8ch). To some extent I see this situation mirrored in the commercial sphere, through SaaS companies. Control is guaranteed as long as the portal is in your hands. You don't own the thing. You can just use it.
I'm not sure where I'm going with all this. I just see a lot of similarities to other situations and commercial decisions. To some extent MQA mirrors the analog media you can't play without the right gear, and those quality compromised netlabel releases.