I don't know about Solomon960, but I've met a handful of people, mostly/all men, who eat very repetitive diets. My Dad likes his roti and thal/beans, though he does enjoy fruit. He'll eat his vegetables, but I don't think he much cares for them. I think this tendency is much worse in people who don't know how to or don't want to cook. I remember reading Early Retirement Extreme surprised by the limited food of Jacob. I eat fruits and vegetables because they're good for me, sure, but also because I like them. Its definitely extra effort to shop/cook, so I can understand people who'd rather not. Food is a paradoxical good - it takes mere minutes to eat, but it provides happiness for hours.
OTOH, I don't eat out for a variety of reasons- health, allergies, cost, energy. I think partly, too, I don't want to get used to having good sushi, or pho, or Thai food, that is costly in terms of time and money and not particularly healthier for me. Mostly its the sense that I'd rather splurge on ingredients, though I don't do that regularly. I ate out for special occasions when I had a higher income, but I have coworkers who order lunch 3x a week, so it is possible. I don't know, it feels to me like I've tried a lot of foods in my adult life, and "I know what that tastes like." My nephew was talking about which fast food fries are the best, and I just could not care. They're all fries. I do miss the variety that I had pre-Covid, from eating at friend's homes. Often its the same dishes I make but it tastes different because someone put their own spin on it.
Food is not that different from clothing, cars, housing, travel with a range of price points and everyone has to have their own idea of what's enough. I spent the last 3 years wearing scrubs to work, and appreciated the simplicity of not worrying about what to wear.