Time is money
Apple offers high-ish priced, but fairly reliable and ready to go packages.
Microsoft offers non-stop updates and investing in time to become proficient with registry and AD debugging.
There are people who's time is actually worth something. They are the ones that pick macs and get on with earning money. Not a popular opinion here, but not everyone is an enthusiast that will give up shagging his girlfriend to pick the best candidate motherboard for his 3rd rebuild this year.