how about if someone knows how to replace the windshield of a Honda Civic, does that mean he would be able to replace the windshield of a Ford Explorer, your analysis has a blind spot bias.
It's 2 relatively similar devices, its different if someone wants to fix the motherboard of a phone compared to the motherboard of a PS vita, but when you talk about the screen, this is something that should share a generally similar idea. remove the screws, casing, bolts, glue, remove screen, add new adhesive, new screen, put back casing and screws.
Its just that the dude was thinkign like you and didnt want to do it for me, i had to look up how to do it, and most of the videos i watched were on how to replace 3ds screens, they are relatively similar