I'd actually recommend the opposite. Unless you're a DIY hobbyist who loves taking everything apart and you don't want to print immediately upon receiving it, it's worth it to buy the prebuilt Prusa. There are so many many steps in assembling a MK4S that there are that many steps to get something wrong. Better pay a few hundred extra to get one that has been assembled by a more experienced person. And I say that as a makerspace coordinator who works with a lot of 3D printers.
Assembly teaches you how incredibly complicated the assembly is. I've adjusted pre-assembled printers with minor inconvenience. But the first one you put together can take more than the estimated 6-8 hours.
Yeah, that is a pattern I've seen. I grew up having to troubleshoot stuff offline just to get a modem on PC to work on dialup to get to a BBS or CompuServe or editing mods for computer games, whereas my Mac friends were mostly playing with artistic programs on Mac. I also used artistic software on PC but that too required more skill. I don't recall seeing them deal with a command line interface whereas most of my earliest games ran in DOS.