US and China is way beyond cosmetic reasonable or unreasonable stage.
Its life and death struggle now.
Alot other Chinese companies got sanctioned but they didn't even bother to say anything because they know it's useless.
The reason SMIC got panicked and scared is because they worry about their stock price due they got alot of Taiwanese executives and engineers. The main reward is from purchasing SMIC stocks at low price. If it got sanctioned their stocks won't be good hence Liang moon song and others will be hit hard. Whereas Huaweiand many other Chinese aren't trading publically in stock. Thats why they desperately try to be in good terms with US.