little fuzzy on my shaman lore, but if I remember right, shamanism is a communication with spirits, not so much a tie to the natural land.
They're calling the aid of spirits to lend them powers, where druids would actually pull power from nature itself.
Industry doesn't fly directly in the face of shamanism as it might with druidism.
I don't know how to argue away the pillaging of the land though, I'm sure the earth spirits might have some problems with that. Only argument I could throw out there is that Blizz kinda said that the 'horde goblins' were just one organization, tied to only one (or more) of the trade princes. Those princes may not 'pillage' as others might.
Come to think of it actually, the goblins we see tearing out mountainsides for mining and whatnot are mostly Venture Co., and they employ a number of races, Dwarves included. So it's probably not fair to associate the actions of the Venture Co. with that of Goblins as a whole.
Yeah, I'm gonna stick with that