Once marijuana is legalized it’s only a matter of time until growing your own is also legal. Just like making your own beer, wine or liquor. The revenues will plummet to nothing. Even potheads can figure this out.
That’s true, but it’s still a fair amount of work.
Which slackers tend to avoid.
Home brewing hasn’t put brewers out of business.
The ability to make your own beer hasn’t damaged the beer industry. And it’s legal to grow your own in CO, and yet they say the prices are high. The fact is growing and brewing are both a lot of work, not everybody wants to put that much effort into things. Which is why restaurants exist. There will ALWAYS be a market for letting somebody else do the work.