Though I disagree that a phone is not a 'general computing device' moreso than a gaming console is, it is hard to come up with a legally-clear definition of one.
The Xbox and PS5 are literally using an AMD Zen2 CPU and an AMD GPU, nothing weirdly custom like the PS3's "emotion engine".
There's no reason they couldn't run a standard Linux or even Windows. They have HDMI ports, USB and everything just like a normal PC. Even the PS3 with it's super weird processing system had a _native_ Linux version provided by Sony[0].
Why aren't people up in arms insisting that Microsoft and Sony allow us to install Linux on "our hardware", but are so very pressed when they can't do that with a phone? Why is a console walled garden perfectly fine, but on a phone it's anathema? Are people still thinking of the NES when they hear "console"?
[0] Yes, it was there to dodge import taxes, but still =)
However you are right, it is hard to make an unambiguous distinction, so I am with you - consoles should also be forcibly opened up. I do strongly hold the philosophical view that if you own any computing device you, as the owner should have absolute control of what that device trusts as far as any cryptographic 'locks' are concerned. The place where this seems to have both a) the largest negative impact on the market and b) the best chance of people caring and doing something about it, seems to be with mobile computing, so that is where the voice are the loudest, but personally at least, I hold the same view about any device.
Our society has long held that reverse engineering is perfectly acceptable when it comes to interoperability / competition, even if the OEM doesn't appreciate it. Now, we have progressed technologically to the point that an OEM can literally prevent any reasonable manner of that, if they want to. I just don't think our laws / society have really caught up with that fact yet, but for me it follows directly from the reasoning behind allowing reverse engineering that we shouldn't allow this.
So I don't know why you keep bringing this up as if it is a counterpoint. Yes, it's a similar situation, and yes anything we do about Apple should apply to Sony as well.