You kind of chose the wrong series laptop to point this out. X series ThinkPad is ultra-portable line where sole focus is on weight and thickness. You can make an argument that memory clip doesn’t weigh a lot, but they really reduce every gram they can. Literally every other series has clip-on RAM.

Even if we ignore RAM, on ThinkPad pretty much everything is replaceable with a single screwdriver. Literally anything. You grab FRU#, find part that matches it and off you go. With Apple it’s ungluing battery, ripping things apart. Hell even keyboard is riveted into the case and you have to drill holes and make threads to replace it. It’s not comparable at the slightest.