What evidence do we have that this kind of abuse of power would be impossible in crypto world?

It would only be possible if everyone used anonymous coins like Zcash and Monero from their own wallets. Any use of exchanges or secondary networks like lightning provides levers to turn people off. Any corporation can be subjected to pressure by not just governments but large groups of people.

I don’t see people like the trucker protestors using cryptographic hardware wallets and waiting minutes for transactions to clear on a block chain.

BTW the trucker thing was a line for many people including myself, and I wasn’t anti-vax and did not vote for Trump. Freezing the assets of people for participating in a protest is not okay. The content of the protest is irrelevant.