My Dad had a saying. Well, actually, he had a gazillion sayings, but the one that came to mind here is,
Sell to the classes, eat with the masses
Sell to the masses, eat with the classes
Meaning, selling a rarity or niche product for a premium, you still have only a niche market, so although each item costs more, overall you cannot make big bucks.
Whereas there's always a market for a mainstream product, so if you get everything else right, it's possible to sell more and therefore make more money,
Not always directly applicable to farming, of course. But perhaps more so than one might think at first glance