No, he's comparing making eggs for breakfast to picking up an egg McMuffin. Most people would rather buy something that someone else made than make it themselves (if the price is reasonable). There is an "economy of scale" that says it will be far cheaper (and more convenient) for one person to grow a lot and sell it than lots of people growing a little.
So the cartels, who already have large plots dedicated to growing the stuff, would continue to dominate the market. The average user would be perfectly happy to continue to buy rather than go through the trouble of growing his own (it's not like the first word that comes to mind when I think "pot smoker" is "industriousness")...
That may be true but the bottom line and the point to my posts is that if growing were legal, the cartels would be out of the pot growing/smuggling business. Lots of retirees out there with 'green thumbs'.