Agreed - King Tubby was a non-smoker yet some of the "best dub" has him at the controls. He was really into jazz, and his deconstruction and rebuilding of a song and rhythm owes a lot to the jazz idea of taking a standard and reinterpreting it. A lot of the early dub albums ( Aquarius Dub, Dub Store Special, Java Java Java Java ) have little to nothing in the way of stoner effects, instead concentrating on stripping a song to its drum and bass foundation and then teasing instruments in and out of the mix just like a jazz musician would take a little solo spot for a few bars. There was also an economic element with original dub as it would allow a producer to pay the musicians just one time and then use the dub or version as the b-side of a single, essentially getting double their money's worth.
I'll stand by my posting Imagination upthread as in my opinion the Night Dubbing LP is true to the "spirit of dub". Big chart hits by a pop band taken apart and rebuilt into dub versions that could then be played at The Paradise Garage, rather than the school discos and Saturday night meat markets that were their former home. Here's the dub of Flashback, a massive hit, containing just enough of its original vocal hook and melody to provide familiarity but bringing the drum and bass elements to the fore. The album was also true to the original spirit of dub as an entire album of recycled material could be sold to the public making money for the producers without having to pay any musicians..