That isn't how it works, flavor sensitivity is orthogonal to heat sensitivity.
Being desensitized to heat does not desensitize you to flavor. Because of a correlation between heat and flavor diversity in peppers, people desensitized to the heat can taste the more complex range of flavors available in peppers.
There it is! It only took about a dozen posts to attract a fan of the recent trendiness in ultra hot peppers to state that heat lovers have superior taste.
I never stated any such thing nor am I a fan of ultra-hot peppers, but you sure seem insecure about it. What I did state is not controversial. Self-selecting expertise in the qualities of food applies to a great many things we eat. It doesn't have anything to do with "superior taste".
Anyone can learn to eat peppers, most people choose not to. Could swap out peppers for a very long list of other foods and it would still make sense.
Being desensitized to heat does not desensitize you to flavor. Because of a correlation between heat and flavor diversity in peppers, people desensitized to the heat can taste the more complex range of flavors available in peppers.