Well in 20+ years of running a Linux OS on the desktop I've never had a virus, malware, trojan, worm, spyware or like become imbedded in my computer. I've never had to purchase a OS or anti-virus program like Norton or McAfee to secure my install or personal info. I've spent plenty of time surfing the most dangerous places on the net without worry, and even went to known places containing things like mentioned in the first sentence just to see what was there.Maybe, but I am almost certain that the overwhelming vast majority of Linux users don't have a real compelling reason why they are using Linux, aside from the 3 reasons I provided.
OTOH, places like BB Geek Squad to mom and pop computer shops have made a fortune cleaning and repairing computers for the poor Windoz folk who have clicked on the wrong link once or twice and ended up with a boat anchor for a computer. I wouldn't want to add up the hours I spent at my last H-D dealer job trying to keep all the Doz computers usable and I was a just a floor manager there, not a IT guy.
Irrelevant. If you think a Bose radio/CD player is the height of Hi Fi you will forever be known a as a beginner at this site or most any other enthusiast place. LOLHowever, it is my believe that unless you can navigate and configure Linux via command line (I would even add fluency using the VI editor), you will forever be known as a beginner Linux user.
For last 15 years I've maintained the computer in our community library running a Linux OS desktop on it. Folks come in and out using it daily to do all their normal computer type needs and don't even realize they're not using Windoz. All I've done is to rename a few basic apps and icons to the ones they recognize from Doz. They wouldn't know a "command line" if I hit them in the head with it. LOL
Linux may be secure because of it's basic design, or simply because of it's rarity like a Mac's.
In the end it matters little, it still a super secure platform and unlike a Mac, most Doz users can sit in front of it (like my library desktop) and navigate normal applications without problem.
YMMV