If it's illegal to possess even if you by it legally, then it's still better to go to the local dealer...though one thing I did like about practical legalization of pot in California is that it put bad dealers out of business (now if all the bad faith managers and suits of legal professions could also be put out of business...but then I'd fear the economy would collapse!).
But it's easy for me to fall back into my thinking of growing up in rural Texas where there were patchworks of wet and dry states (most dry counties, that is where sales of alcohol were extremely restrictive if not outright prohibited, though it was legal to be in possession of, at least in your own property, not counting guzzling a beer as you drive past a cop, or worse, throw it out your window so the beer can or whiskey bottle bounces off the cop car's windshield, always good for a laugh as long as you're not in the vehicle of the offender).
Ah, the memories, but that is neither here nor there. It did add to the number of drunk drivers that wouldn't have been on the road otherwise, and even hitchhikers were a danger as well as in danger who were going to get alcohol. (In the last 20 years, most dry counties have since gone wet, that is more or less normalized with the rest of the US.) It made things worse instead of better.
And I say that as someone who has no special love for beer or intoxicants of any kind (though I see the War on Some Drugs as a cure worse than the disease, and on top of that makes drug and alcohol abuse worse in habit and consequences, and wish instead that such was generally treated more as a medical rather than legal issue, and admire the Portuguese policies, all I'll say on that which is to show my stance is more nuanced than most would assume over a few snippets of what I share, particularly in this Age of Cancel/Destroy).
So at a gut level I see Stake Fodder's point (and I'm certain it applies at time), there is a difference between neighboring small counties where it's legal to own alcohol in both even if one can only sell in one, than in a much larger state, especially if the state that doesn't sell also prohibits ownership.
Still, I hope Ohio legalizes (actually, I prefer decriminalization to legalization--and would also put most alcohol under the decriminalized than legal category as well, but if forced to choose between full legalization and War on Some Drugs, then I choose legalization without my usual hesitation), and that in this case people are right that where Ohio goes, the rest of the nation follows (even without knowing it).