Every Jamaican is a Rastafarian or should have dreadlocks
Dreadlocks does look good on anyone who spots them but not every Jamaican is into the look and that is okay too. People tend to also think all Jamaicans are Rastafarians and try to link the two.
No please, being a Rastafarian is more of a religion for those who believe in Rastafarianism and being an ordinary Rasta man or woman, that is keeping dreadlocks may just be for the beauty of it.