What kind of novice user buys a laptop and questions changing the OS, or even knows what an OS is, or that there is even an alternative? I think you claims are ... dubious. Novice users, like my grandmother, never ask me if they should install Windows. They just ask me to fix it after it breaks. And it breaks often. On the contrary, when I put something like an iPad in their hands I go a lot longer between support calls. That's my experience having dealt with more than a few 'novice users'.

My relatives' Windows PCs always break and it is always a real pain to fix them. There are also problems on the Macs in the family, but they are generally more wrt. 3rd party software. It is far from perfect in Mac-land, but definitely much better than Windows. It is not a "just works" platform!