[daraul]

You can, but you can also make the value calculations in your head and decide that instead of learning how to properly cultivate it, keeping bad plants out, and the time/money consumed in a quality growing op, you'd rather just throw a bit of cash at someone else and use all that time for other things.

There are only so many hours in a day, and outsourcing those hours for a little money is a perfectly reasonable explanation for how a real industry will pop up around this.