Intel i5 6600K on a Z170 with Windows 7 reporting in, that statement is definitely not true.
Installing is not straightforward though, you have to load drivers into the installation environment if you're using M.2 or USB 3.x.
IMHO the effort I need to learn that causes me far less frustration than having to use Windows 10. My total experience (helping colleagues/friends with their Win 10 systems) is probably less than 60 minutes in total, but one look at that start menu with actual internet-loaded ads (!) was enough to dissuade me from ever installing that OS on any of my systems. If they're greedy enough to blatantly do that, who knows what kinds of other dark patterns lurk within that OS...