There was a time when computers were more amenable to such things, less easy to screw up requiring expensive recovery, The raspberry pi has at least tried to address that end of the market. It's easy to hose the OS on the SDCard, but you probably downloaded and installed the (free) image on the SDCard yourself anyway, so you can recover from even the worse rm -rf * incident.
I'm not sure most people could rebuild their windows laptops from the recovery CD that came with them so people are not as at liberty to mess with them as I was as a kid when my ZX81 and my Atari 800 ran from ROM and it was always just a power cycle away from being "back to normal".