our taxes pay for customs to seize components of iPhones and file charges on behalf of apple for counterfeit goods. If you take your iphone, travel to china, take it apart there, and send to to the US by post, the customs will seize it as counterfeit.
Honest people are going to jail to preserve Apple's profits.
https://www.vice.com/en/article/a3yadk/apple-sued-an-indepen...
You also probably don't know about part serialisation and other efforts that mean that even if you product a compatiable part, the device will reject it.
This is the case with tractors and phones. I am not 100% up to date with dishwashers.
Why not go disrupt them and put some of those cash cows into your barn instead?
On phones, last weekend I replaced my wife's iPhone X battery with one from Amazon for $18.99 + $1.19 in tax and 45 minutes of very straightforward work. If that $20.18 repair to get an extra 2 years out of the phone is the result of excessive profiteering or protectionism on the part of Apple, I'm pretty sure I'm OK with it and don't need/want government intervention to "fix" it.
I could have sent taken it to Apple and gotten it replaced for $70, which also seems totally reasonable to me for a parts-and-labor repair to get 2 more years of service.
My preferred modus would be to buy a current manufacturer, then strip out the high paid execs and minimise the profits in the form of very cheap repairs.