As far as companies are concerned, it will always be cheaper to import and pass the cost on to consumers. That's all tariffs do. They raise prices.
Because it would be extremely expensive to build all that infrastructure, resource reclamation, factories, and worker training when it already exists someplace else.
Millions of jobs aren't going to spring into existence because of a tariff, and even if they did, eventually, the cost of those high wages would be paid by you, the consumer.