(possible) != (as easy as possible)
The claim is that making illegal transactions impossible would cause societal harm.
I agree that it's an amusing idea, but it's also extremely important and not much talked about. Bruce Schneier touched on it in a 2018 essay (https://www.schneier.com/essays/archives/2018/11/surveillanc...).
> All social progress—from ending slavery to fighting for women's rights—began as ideas that were, quite literally, dangerous to assert.