Quickie
Colonel
US is killing their goose that lays golden eggs. This will just speed their downward tailspin. China is the largest market. If the EU becomes self sufficient as well, who is the US (and Taiwan, by the way) going to sell to.
It's a just punishment for not playing fair.
You have to thank the Orange One for how this state of affairs come about. China was initially trying to be nice by not being very aggressive in the timeline of their endeavor of being independent on semiconductors, considering that that could potentially make worse the gripe that the U.S. was having with China, that was the trade imbalance between the 2 countries.