There are no consequences to buying more expensive products if they're made here compared to overseas. A person's wage doesn't suddenly go down, their wage stays the same, but now they're paying a more accurate price tag of what the item should've cost all along. You don't HAVE to buy the $850 iPhone, you can still purchase the $400 Samsung J6 if you can't afford the iPhone, which Samsung is a company that does import its products because they're based on Korea. Apple doesn't "compete on lower end phones," which isn't anyone's problem but their own and they're free to run their company that way, but now they'll have to either lose market share or lower their prices at some point.
You need an Apple iPhone about as badly as you need a thong sold by Victoria's secret, there's similar, more affordable items that are just as good sold by other companies.
Yes, it does.
Say you earn $2000 a month. Bread costs $1 a day. You have a pretty decent wage. Say bread suddenly becomes $10 a day. Do you suddenly have such a good wage? No, you don't, the value of your money isn't the same.
Some people have money to burn. But other people don't and they can choose which products to buy and will live within a certain amount of money.
Consequences of making an internal policy, forcing Apple to make products at home will mean the Chinese, especially the Chinese, will then develop more high quality products to replace US products that will inevitably cost more, and then Apple will struggle as a business.
Such a policy would make it harder for US companies to do business abroad. They might do better at home because of tariffs on foreign goods, but the US market is 300 million people. The market for Apple worldwide is billions of people. Think about it.