Your viewpoint made sense a few years ago, but Mac ownership and use has evolved. OSX/macOS has several advantages for security, including lack of commonality and the unix base code and security structure. However, it's an increasingly visible and profitable potential target for malware because people who have Apple hardware are a bit more likely to actually have money.
And don't forget, if you're running a system that doesn't get attacked because it's got a low market share? That is *still* some form of effective, if accidental and more fragile, security. Evading 95% of the threats in circulation just by choosing equipment that isn't vulnerable is a benefit. No, it doesn't mean you should get sloppy, but it's peace of mind.
Personally, macOS/OSX just bugs the hell out of me for some reason and gives me a headache every time I launch Finder, so I stick with Windows and don't download things like an idiot.