I don't think it's that naive. My overall point was at the price you'd spend on a Mac, you would be getting an ultra-crazy gaming laptop at the same price. If you're needing a computer for casual use (documents, presentations, etc.) you can get a very good one to handle these tasks for a fraction of the price. I'm not sure about the OS advantage. A majority of users I work with claim it's more "user-friendly" but end up coming to me for the most basic of issues they can't figure out. Don't forget the software incompatibilities as many companies are still not making software friendly to both (especially career-specific software).
Windows 10 fixes a ton of things that I absolutely hated with 8. The only thing I dislike is all of the privacy options you have to change so you're not sending data to Microsoft.
If you're using a Mac for Garageband, I can't fault you there. That program is really good for a basic use without overcomplicated software. Other than that, you could save a significant amount of money for a laptop good enough for casual use.