A shot in the head is worth two in the feet
I have always said that America's attempts to isolate China were misguided.
It is always better to keep essential supplies going and threaten to reduce supply to steer a recipient in a desired direction. It's easier, cheaper, and less disruptive for them to comply than resist. You can keep them on that leash.
As soon as it's "none for you" they have no option but to find an alternative, and that will usually have them looking for a sovereign home-grown solution so they are never placed in that position again.
At that point you've lost any leverage you had over them, and may have even gifted them the upper-hand.