Yes, and not just retailers - anyone who set up on their own to provide a particular service. These people often tend to end up as part of the underground economy. Take untrained psychological counsellors, or perhaps astrologers. No planner in their right mind is going to make provision of astrological services by the State an economic priority. Yet there is clearly a demand for them.
Society needs the flexibility to embrace new ideas.
But you re evading the hard questions. I m not sure. I ask one difficult question and you re stumped. I never claimed to be a Moses or a Marx. It would be up to people to decide democratically whether it was a good thing for one person to employ others and so have power over them - the power to pay them a pittance and sack them, perhaps.