Because it's only words. There have been no actions outside of punitive tariffs, which are legal. There's no indication that the "threats" are any thing more than words, given the lack of actual action.
Much like Trump's last term. He certainly said he would do a lot of things.
Indeed, and since it was approved by Congress I'm not sure how Trump has the legal authority to unilaterally violate it without congressional approval. (Not that such legal niceties actually matter, as we've all learned by now.)