It's the same reason more people eat McNasty's than mangos.
The same reason millions of people sit down every weekend to watch shite like celebrity scrictly come x-factor island rather than read a book.
Every (normal) band's dream or an artists is to get as much people to listen to their music as possible, to recognise their labour and hard work, Slayer is no exception. Metallica is just better at it than them, always have been, always will be John Crazy.
Metallica are lowly scum. The Manchester United of metal music.
Okkkkay I'm guessing you have something personal going on there with Metallica... erm I'll move on to the next point...
Got them in 17th, behind country legend George Strait and Mariah Carey, who presumably we should all think are fantastic now on the basis of selling more CDs than another band?
Fantastic powers of deduction you have there, I'm guessing you've never heard of music genre's, and how, you know, maybe you should compare like for like ? comparing Thrash Metal with Mariah Carey ? and you seriously want to make a valid argument ?.
I'm also guessing you missed the...
There is a reason why Metallica (Hall of fame, 7th biggest selling act in American history) is where it is
bit in my quote there... look it up in Google.
I wanted to address the rest of your post, but there really wasn't much else to take from it to be honest.
Look, I'm not going to try and convince anyone whether Metallica is any good or not; it's all about musical tastes, and much like your trimmed, slick Cuban loving hole, everyone's got one (some may not be as trimmed, I dunno).
In terms of success, and recognition, Metallica dwarfs anything Slayer has or will ever do, and this is not my opinion, this is fact, based on album sales, based on media/critic recognition, sold and sold and sold out shows, while they just played a sold out Pepsi Centre, Araya and the boys were struggling to sellout the Hammy Odeon co-headlining with Trivium
and yet Slipknot sold out more dates than them at this venue a month or 2 later, without a need for a co-headline.
Tell you what though, my mate's crap band plays in front of 50 people down the pub, they're well hard, no videos, MTV airplay or nothing, full of integrity, not like these sold out famous Slayer boys, yeah ?.
By the way for those interested, Metallica are all but confirmed to be back for more sold out shows in 2010 in the UK
happy trimming Juan