You made a mistake in thinking that Apple isn't interested in preserving their margins. It will cost Apple more for each product they sell. Sure, they could eat the cost or simply pass it along without additional charge. But, either way, that would hit their margins and their stock price hard.
Agreed. Companies in the US can react to the higher costs due to tariffs by 1) pass it on to the customer which will result in fewer sales, 2) decrease the margins which will result in less profit, 3) eat up savings (if they have them), or squeeze the suppliers. Apple will follow some combination of above. But the thing they all have in common is less money for Apple. A public company's response to less profit, is to decrease costs. The first to go is often research, so the 'apple doesn't innovate will have more to complain about. Other things to cut are quality (check out Disney), and employees. Americans are going to lose jobs in the short term. Will there be a gain long term? Sure the country bounced back from the Great Recession, only took 25 years. Alas I and Donald will died hopefully by natural causes by then.
Folks, we can nit pic on specifics, but there is no doubt the landscape is shifting under our feet and not in a good way.