There is more than one thing to enjoy about anything and yes, someone may enjoy aspects you aren’t even aware of even if they don’t enjoy the aspect you think of as the core aspect.
You brought up the subject of food, but not everyone even agrees that taste is the most important element. For some it’s the social aspect of the meal. For some it’s the nutritional value. Some may only tolerate the taste of something but enjoy the texture or the warm feeling in their belly. People can also eat things they don’t enjoy but be glad they did for the experience of just trying that thing.
It isn’t outrageous that you don’t understand it. It does imply that you’re blind to all the other aspects of games that bring people enjoyment. You personally would probably be better off not trying to defend this and instead trying to understand the views others have. You could just ask the poster what he does care about in games.