He's making a claim that minority preferences will "win" -- his word, not mine! That claim is not supported by anything at all in his argument, nor is it what you are claiming.
“Second, the cost structure matters quite a bit. It happens in our first example that making lemonade compliant with Kosher laws doesn’t change the price by much, not enough to justify inventories. But if the manufacturing of Kosher lemonade cost substantially more, then the rule will be weakened in some nonlinear proportion to the difference in costs. If it cost ten times as much to make Kosher food, then the minority rule will not apply, except perhaps in some very rich neighborhoods.”
> It suffices for an intransigent minority –a certain type of intransigent minorities –to reach a minutely small level, say three or four percent of the total population, for the entire population to have to submit to their preferences.
It's a far cry from that claim -- that a minority as small as 3-4% can force the majority to submit to the will of the minority -- to the claim that a majority will accomodate a minority as long as extra cost incurred by the majority is not too much. The former is an unbelievably strong claim while the latter is obvious and inane.
The conventional wisdom is that normally the preferences of the majority prevail. Maybe it’s obvious to others, but I never thought about the minority rule explicitly before reading Taleb. And the rule has practical applications for privacy/climate activists, so I think it’s important not to dismiss it offhandedly.