This theory mostly does not actually contradict OP’s, except for the assumption that the problem of motivated reasoning would eventually be evolved away.
We can believe that motivated reasoning is caused by a short-term planning algorithm pressuring a long-term planning algorithm into getting what it wants ; and that getting rid of this mechanism would be very costly and so we shouldn’t expect it to disappear any time soon, if at all. Both seem quite plausible to me, and do not preclude one another.
I’m not sure how seriously I should take the narrative about the anti-free speech situation in EU/UK. Every time I try to dig into one of these stories, it seems to land into one of 4 categories :
A one-sided story that doesn’t seem trustworthy at all. The Greg Lukianoff article you link mention the ‘most surreal case’ of Elizabeth Kinney. After looking into it, frankly, I just don’t believe it. There are too many improbable details, like that 11 policer officers were sent to her house and dragged her out of her bath—regardless of the free speech situation, this is such an incredible assertion that I wouldn’t believe it with anything less than video footage. Also too many important pieces of the story that are missing for no good reason that I can think of : why she didn’t report the assault, why her ‘friend’ was angry enough at her to report her to the police, how many messages is the ‘barrage’ that the prosecutor referenced, or even what the exact texts were. No serious journalism seems to have been done on that story by anyone, and if forced to guess based on what’s available, I would guess that the assault is widely exaggerated or entirely fabricated, that she harassed her ‘friend’ with hundreds of messages, and that this was overall a minor, reasonable harassment suit which just happened to involve a politically incorrect slur at some point.
A complete non-story, like the Norway tweet you link. As far as I can tell, the woman purposefully tried to post something that would trigger the anti-hate speech laws to bring attention to them, and now she says that she is under investigation by the police and faces up to 3 years in prison. I haven’t seen any evidence that the authorities actually care about her message at all.
A clearly correct story, generally involving a call to violence, like the Graham Linehan case referenced in the Greg Lukianoff article. He is a public figure who said that if a trans person tries to enter the ‘wrong’ bathroom, you should ‘punch him in the balls’. I do in fact want public figures inciting people to assert their political preferences through violence to be given a stern talking to by police officers, which is what appears to have happened here.
An ambiguous, messy story, like the case of the UK judge you mention. The story appears to be that various progressive activists are getting away with what are pretty obviously serious crime by convincing juries to acquit them regardless of the evidence. And on the one hand you want juries to be able to not enforce unjust laws, but on the other do you think it’s normal that e.g. pro-Palestinian activists can repeatedly cause hundreds of thousands of damage to random Israeli companies and get off scot-free ? My impression is that as things in the latter category are becoming more common, UK judges are attempting to curb the phenomenon. An appeal’s court has reiterated that juries could not be convicted of anything based on their verdict, but at the same time they clearly don’t want this to become a standard legal tactic—so about the same status quo as in the US.
Now I don’t doubt that there must be a few truly disturbing anecdotes—Chinese Robbers and all that—but if there is anything more, I can’t see it.