We all have our personal tastes, because we all are individuals. While we shouldn’t ever waste food, if those who prepare it know that certain foods are found to be unpalatable to certain persons around the table, but choose to serve those foods anyway, I think one should be free to select from the variety that which one enjoys and not have to eat what one cannot stomach.
In all fairness, the preparer should offer a large enough selection of foods so that everyone can enjoy at least some portion of the meal.
I don’t think it’s right to force someone to eat something they detest. I feel we all have a right to our personal tastes in cuisine. It’s not right to try to cram anything down anyone’s throat.
We eat for two purposes: Nutrition, and enjoyment. That’s why we have taste buds. And as long as one eats enough good food to receive sufficient nutrients to stay healthy, I don’t think anyone suffers if there are some items one refuses to eat, just so long as the diet is reasonably balanced.
When it comes to food, good servers will respect the tastes of those they are serving and either avoid serving what they know isn’t liked, or else include plenty of other dishes that they know ARE liked.
That’s the considerate thing to do.