But, like all things, there are exceptions to this trend, which ironically also drive the trend, and that is entrepreneurship. At a new firm, there is little to no specialization, and therefore little to no role specialization - everyone does everything it takes to get the product off the ground. And the analogy here is to a craftsman or member of a guild. But along with the wide berth of responsibility comes the opportunity for creativity and expression (just like a craftsman). The irony, as mentioned before, comes when the firm grows and requires specialization, organization, and hierarchy, to continue its growth and achieve efficiency gains necessary to stay competitive.
Of course, then a member of THAT firm might leave to start his/her own company, and the cycle begins anew.