You might as well say that the 'glitter band', 'mud', and 'showadywaddy' dominated the 70's, you can't just use commercial singles chart popularity to define a decade...The Cure, Southern death Cult, The Cult, The Clash, Talking Heads, The Cocteau Twins, Everything But the Girl, New Order, Echo and The Bunnymen, U2, Mudhoney, The Pogues, Cabaret Voltaire, The Pop Group, 23 Skidoo, The Pixies, Ride, Husker Do, Jesus and Mary Chain, A Certain Ratio, Wire, PIL, The Smiths, Beastie Boys, Public Enemy, The Wedding Present, Bill Nelson, Sister of Mercy, Killing Joke, Ministry, The Fall...etc.etc.
Were far more representative of the decade from an artistic point of view, unless of course you were listening to dire straits, and shopping at Millets