He wouldn't be making the best because there is no best. Everyone has a different opinion about what's the best or even good. Pizza is like cars. Everyone has different tastes.
Pizza is like cars, huh? You really think there's a lot of people out there that don't like Ferraris? With enough forethought, care and attention to detail, one can make the pizza equivalent of a Ferrari- and it doesn't have to cost a couple hundred thousand dollars.
We all like to think of ourselves as being different, as being unique, and, to a small extent, we are, but, at the end of the day, people's tastes are not that different. Write a great song and most people will enjoy it. Make a great movie and most people will see it's inherent greatness. Beautiful women are generally perceived as beautiful by most men. Are there outliers? Of course. Are these outliers statistically significant, though? No. According to the small sampling of people that I've come across, I'd guess that 1 in 300 people don't like chocolate. Does that have any impact on the level of adulation the rest of us have for chocolate? Of course not. Great pizza has that same level of appeal.
NY style pizza is not a niche product. It's a product with mass appeal. You're not targeting outlier tastes. When you sell a NY slice, you're tapping into a universal aesthetic- you're writing the song, that, if great, most people will love. You're manufacturing the car, that, if done right, almost every person would just about kill to drive.
When I make pizza for others, be they family, friends or strangers, I strive for 8 out of 10 people telling me that it's the best pizza they've ever had. If I don't achieve that, I've failed. This is the commitment to excellence that I try to instill in my clients as well. There are highly quantifiable, objective qualities to a pizza (such as oven spring, crumb texture, cheese coloration, charring, microblistering, fermentation flavor byproducts, etc.) that, when achieved, produce an inherently superior product- a product that will produce religious experiences for those that consume it.
Pizza is not a widget who's success rises or falls on the way it's marketed. It is a drug, a potential pathway to bliss that you addict people to. Truly great pizza is more addictive than crack, and, just like crack, you don't need marketing to sell it.