It's not really about profits. It's about survival. For example, if you produce televisions in the USA, you won't make less profit, you will go out of business because you can't sell any at the price you have to charge to make money.
Now maybe the issue can be addressed through tariffs or some other way, but companies are doing what they have to do to compete with other global companies that are producing their product in China, etc. I'm not sure what the answer is, but you are right that we need to be more self sufficient.