you challenge me to call out every single "expert" who disagrees

The thing is, I'm not challenging you to "call out" the experts. You had challenged them when you dismissed every other system as "illogical". If you had just made a post about why you like utilitarianism, I would be fine with it. But you made the CLAIM that other systems are illogical. I'm simply asking you to defend this claim.

It's like if we were arguing about immigration and instead of making an argument I said that you can't dismiss Laurenn Southern, Milo Yinopolus and Richard spencers arguments as illogical at the flick of the wrist, you need to look into them and give reasons why they are wrong.

An analogous situation would be this: We were arguing about immigration. I argued for a liberal view of immigration, and then at the end said "all other view points are illogical". Then you say "Hey, if you're going to make that claim, you need to explain why they're illogical, why are these other guys wrong?"