As a member of some facebook group of rock fans I noticed there are a lot of hard rock and classic metal fans who love Rush and they don't care for King Crimson, Yes and Genesis. Among hard rock and classic metal fans Rush is obviously a much more popular band (and hard rock is the most popular form of rock music).
Ummm...what? Citing the opinions of people on a Facebook as proof of ANYTHING is patently absurd. As far as "hard rock [being] the most popular form of rock music," you'd get a lot less grief around here if you'd stop stating ridiculous opinions as objective facts.
Why is it absurd?
And how can you deny that hard rock is the most popular form of rock music? And how can you deny that Rush much more appeals to hard rock and classic metal fans than King Crimson?
It obviously depends on what you think is "hard rock", but other than AC/DC's "Back In Black" and Guns' "Appetite" - both bouyed by a single that is decidedly NOT hard rock - and Metallica's "Black Album" (about which most "hard rock" fans claimed they pussed out) when you start to look at the rock albums that have achieved Diamond status (10,000,000 sold) you're not conclusively in "hard rock" territory.
Hotel California - The Eagles (NEVER a hard rock band)
Hysteria - Def Leppard (Big knock? Most "hard rock" fans claim they pussed out)
Pyromania - Def Leppard (Big knock? Most "hard rock" fans claim they pussed out)
1984 - Van Halen (Big knock? Most "hard rock" fans claim they pussed out)
I - Van Halen (maybe I'll give you this one)
Born In The USA - Bruce Springsteen
Rumours - Fleetwood Mac
Sgt. Pepper - The Beatles
The Wall - Pink Floyd
Cracked Rear View - Hootie and the Blowfish
Slippery When Wet - Bon Jovi
REO Speedwagon - Hi Infidelity
Bat Out Of Hell - Meatloaf
Ten - Pearl Jam
The Stranger - Billy Joel
IV - Led Zeppelin (On the borderline; but I would vote "Not hard rock")
Boston - Boston
Dark Side Of The Moon - Pink Floyd
The Joshua Tree - U2
The White Album - The Beatles
Abbey Road - The Beatles
Purple Rain - Prince