You don't understand why your own nation isn't following the tantrums of a totalitarian regime? That would make your own nation into China, why the heck would you want that?!
We wouldn't be turning into China if we only banned Chinese companies, if we only blacklisted/punished western companies that spread CCP propaganda (nine-dash line, calling Taiwan a province of China, etc).
To quote HN user stale2002: Tit for tat reciprocity is the basis of most modern trade relations.
Banning Chinese companies is actually a ban on Americans using Chinese companies. As tempting as it is to retaliate or perhaps extract national economic gain, It must be done sparingly, if at all, as it as a reductions in freedom for American citizens.