The Smiths are such an important band in the history of British alternative music, it doesn't matter whether you like them or not, they shifted the boundaries, they influenced generations of bands. Love him or loathe him, Morrissey has a fairly unique vocal style, Marrs guitar work influenced an entire sub-genre of Independent music for decades and in doing all that, they didn't ever sign for a major label
You don't like them? It doesn't matter, they changed and influenced the British music scene as much as say Led Zep, Black Sabbath and a whole bunch of others
The SMiths whether you like them or not, were a very important band.