They said

“Acting like centrally planned dictatorships is a good form of collaboration is just so off base. There's no reason to think that introducing democracy into the work place wouldn't immediately benefit both workers + customers.”

That sounds more like there’s no evidence that it won’t work than an unequivocal claim that it will.

Well... there is historical evidence that centrally planned dictatorships are not a very responsive form of government.

Now, corporations usually have the problem of competition, so if they aren't responsive (or at least responsive enough), they get out-competed by those that are. Is that enough to make them different from governments? Perhaps, but I don't know.