How do you make companies competitive? If you just shower them with money, you often get the opposite result: they can't compete because they rely on subsidies and don't need to compete on the market.
If you then force (or "heavily encourage" with tariffs etc) other companies to "buy local", you're hurting those other companies by having them buy the product that's unable to compete.
Nearly everyone also works for a living, or depends on someone who works for a living. Would you also argue on that same basis that strong labor protections, and high wages are better for nearly everyone?
If you intend to cite negative second and third order effects as a counterargument - have you considered whether or not any negative second and third order effects might be applicable to yours?