You are right about the accessories, horribly overpriced.
They have consistently been averaging at 150-200% the price of comparable hardware at least since the 90s
I used to fix laptops for a living. I worked at a place where we had used Apple products and stuff from other brands. Sure, you could buy a core i5 Toshiba laptop that had a similar Intel CPU (though Apple tended to use Intel chips with slightly more GPU performance) at a fraction of the price. The screen was garbage, the WiFi stalled, the touchpad was unusable, using the keyboard made the chassis flex, etc. The comparable products from Lenovo, Samsung, HP were similarly priced.
You can find some laptops with decent Intel or AMD chips for $600 these days. Usually they will be plastic or bricks. Which is fine of you don't mind that. People want thinner products and that calls for a better design to (1) handle the heat or (2) buy the better binned CPU that operates better at lower frequencies.
Not only that but people were willing to buy the used Macbooks. Much better than the other brands where the plastic and PCBs were sent for recycling MUCH more often. Better for the environment.