Dell and Lenovo offer me choice. If my keyboard fails under warranty, I can return my machine for a repair, I can get an on-site repair if my warranty covers it, or I can just ask them to overnight me a new keyboard. My warranty will remain intact after I've fitted that replacement keyboard. They'll sell me spare parts for older machines and provide a full service manual. If I'm a corporate customer, I can buy a stock of parts to keep my fleet running.

Apple fundamentally do not care about professional users. They are either ignorant or indifferent to the ways that their service model fails to meet the needs of professional users.