The original post and the following discussion at https://www.reddit.com/r/esp32/comments/1x3bmjh/ordering_esp... clarify that the devices ordered were likely counterfeit and one had a fake FCC ID, so it was illegal to buy them irrelevant to the new law and likely why they were seized.
So the conclusion is not necessarily "don't buy ESP", but "verify what you're actually buying".
Dumb question: How do you verify what you're buying?
What if they revoke the ability to import an FCC ID (like if it was for DJI) in the time between you ordered it and it arrived? It's not an entirely improbably scenario, and I'm guessing they won't care about the nuance. This administration is incredibly fickle and arbitrary.