We should have the ability to run any code we want on hardware we own

It doesn't work. Everything from banks to Netflix and others are slowly edging out anything where they can't fully verify the chain of control to an entity they can have a legal or contractual relationship with. To be clear, this is fundamental, not incidental. You can't run your own operating system because it's not in Netflix's financial interest for you to do so. Or your banks, or your government. They all benefit from you not having control, so you can't.

This is why it's so important to defend the real principles here not just the technical artefacts of them. Netflix shouldn't be able to insist on a particular type of DRM for me to receive their service. Governments shouldn't be able to prevent me from end to end encrypting things. I should be able to opt into all this if I want more security, but it can't be mandatory. However all of these things are not technical, they are principles and rights that we have to argue for.

Establishing trust with hardware, firmware, and operating system software is currently an intractable problem. Besides the halting problem and the reflections on trusting trust problem (i.e., supply chain problems) the sheer size of these codebases and object code (since you'll need to confirm that the object code is not altered as in the reflections on trusting trust paper) is just too big for the public to be able to understand it. Sure, maybe we could use AI to review all of this, but... that's expensive if every person has to do it, and... that's got a bootstrapping problem.

Basically the walled garden is unlikely to go away anytime soon. It would be easier to change the rules politically to do things like reduce transaction fees, but truly allowing the wide public to run anything they want seems difficult not just politically but technically, because the technical problems will lead to political ones.