Mexican here. I find it amusing that people focus on how spicy their peppers are. They are missing the point. There are many pepper varieties and each has a different flavor. That is the interesting part and how it mixes with different foods in a variety of recipes. Focus on the flavor, not the burn.
You're assuming that you know what 'the point' is. You don't, because it doesn't exist.
Be more charitable in your reading of others' comments. Even if you could take them to be presumptuous or rude, responding as though they are more nuanced will lead to a better experience for everyone.
Here, it's entirely plausible (and frankly likely, given how easy it is to come up with a dismissive answer like yours) that the author meant something like "those who are inspired by cuisines that traditionally use a lot of peppers, like Mexican cuisine, seem not to understand the reason they're used in those cuisines."