True, and the strongest point of Windows, "everyone can use it", is ultimately also its weakest point.
You just hit the nail on the head.
When I was looking for a computer for my home studio, Macs were on top of my list. OSX is a dream to use and was looking forward to use it at home. I never went down that path for two good reasons. Cost and flexibility. Maybe I could justify to spend on a computer which price to performance was less than a PC (after all it did have OSX), to spend a small fortune on software which already had for my PC (but they run so well on a Mac). Flexibility for me was the problem! You can upgrade the memory and the hard drive if you like but thats it. No thanks! I like to build a system to my needs.
This is why Apple likes to come out and brag how they have the most secure OS around. They have built OSX out of a Unix platform, which is a great place to start from. But they have also restrict on what hardware can be used. When you don't have to cater for every hardware manufacturer and have a better control on how software behaves on your system, you have a huge advantage.
When Apple can create hardware for a 'secure system' which can be hacked, they look like a bit of a goose.
Windows has the disadvantage (advantage?) of trying to be the swiss army knife of the OS world. By being a flexible OS to a large amount of hardware/software creates security problems. For all the problems Microsoft have, they still have the number one OS for a good reason. Usability! Something which I doubt Apple wants to do.
a computer is just a means, a tool, to get you to where you need to be
The quote of the month 
