Apple replaced the display on my 2017 MacBook Pro under warranty too (because the backlight died). They're definitely replaceable, just not (intended to be) user-replaceable.
It is user replaceable. A guy came to my house with the new screen and a screwdriver set and swapped it out right there on my desk. Even left an extra bezel behind because they like to warp after months of opening and closing the lid, causing even more backlight bleed.
My Precision is incredibly upgradable and user serviceable (I've swapped my wifi module, ram, m.2s, and serviced the fans myself), but it has a horrible screen (because of severe backlight bleed), trackpad, weighs nearly 10 pounds, and has a battery life of less than 30 minutes after 3 years. Oh, and let's not talk about the thermals...
