Yes you can watch a Youtube video and figure out how to take them apart, Apple's devices have to be serviced by someone after all, but a ton of money, thought, time, and effort go into designing methods and hardware for obscuring the typical consumer's ability to dig into an Apple devices.
I've taken my Mac Mini apart multiple times, an impossible task without buying an iFixIt kit first. The reason I took the computer apart was to stuff a second hard drive into the machine. I had to remove every single component of the machine in order to access the hard drive. It was a huge pain in the ass just to add a second hard drive. Good luck doing that to a Macbook.
My Thinkpad features a single screw that lets me access the hard drive caddy. The product doesn't suffer at all from providing this feature and it gives me the ability to upgrade my machine as I see fit.