For the same reason I don't like bagels, oatmeal, mashed potatoes, oysters, canned green beans, escargot, grits, fudge, and bananas that have gotten too ripe...
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Welcome to the world of neurodivergence and sensory issues with food.

It goes beyond just disliking it; the textures will make me gag.
Mom was trying to make real mashed potatoes verses instant, and after a while, I told her "I'm sorry; I tried, I just can't do it." I can only tolerate it if they've been through a ricer/pureed or have lots of sauce on them from pot roast or short ribs (not just any gravy; it has to be something that changes the texture).
My brother is absolutely the same way, but his aversions are different. He eats oysters, for instance. But my mom, my brother, and me are in agreement on overripe bananas, escagot, and bagels. Dad will eat all of the above.