I've been dismayed by how fast the "we should own our hardware" crowd has so quickly radicalized into "all security features are evil", and "no security features should exist for anyone".

Not just "there should be some phone brands that cater to me", but "all phone brands, including the most mainstream, should cater to me, because everyone on earth cares more about 'owning their hardware' than evil maid attack prevention, Cellebrite government surveillance, theft deterrence, accessing their family photos if they forget their password, revocable code-signing with malware checks so they don't get RATs spying on their webcam, etc, and if they don't care about 'owning their hardware' more than that, they are wrong".

It is objectively extremist and fanatical.

"No security features should exist for anyone" is itself fanatically hyperbolic narrative. The primary reason this event has elicited such a reaction is because OnePlus has historically been perceived as one of the brands specifically catering to people that wanted ultimate sovereignty over their devices.

As time goes on, the options available for those that require such sovereignty seem to be thinning to such an extent that [at least absent significant disposable wealth] the remaining options will appear to necessitate adopting lifestyle changes comparable to high-cost religious practices and social withdrawal, and likely without the legal protections afforded those protected classes. Given the "big tech's" general hostility to user agency and contempt for values that don't consent to being subservient to its influence peddling, intense emotional reaction to loss of already diminished traditional allies seem like something that would reasonably viewed compassionately, rather than with hostility.

I’ve posted about this on HN before; I think that there’s a dangerous second-order enshittification going on where people are so jaded by a few bad corporate actions that they believe that everyone is out to get them and hardware is evil. The most disappointing thing to me is that this has led to a complete demolition of curiosity; rather than learning that OTP is an ancient and essential concept in hardware, the brain-enshittification has led to “I see hardware anti-*, I click It’s Evil” with absolutely no thought or research applied.

Given how the opposition has radicalized into "you should own nothing and be happy", it's not surprising.

None of the situations you mentioned are realistic or even worth thinking about for the vast majority of the population. They're just an excuse to put even more control into the manufacturer's hands.