Well I could make a case that many people do not want to know where their food comes from. My sister and Aunt refuse to eat my eggs saying they know where those eggs come from and don't feel comfortable eating them. I counter that with the case that the eggs they purchase in the store are laid by young pullets that are shoved 4 to a cage, never set foot on soil, and are killed at a year and a half when they go through their first moult and stop laying eggs.
They are just machines to the farm, like a tractor. And I guess that is why they don't want to eat eggs from my hens. They feel like they are eating a part of them. Not seeing or being aware of those factory hens makes them 'feel better' for what ever reason.
Which bring me back to my point of people not wanting to know where their food comes from, and doing a necropsy of a dead animal is too close to actually harming the animal. Even though it is dead the act of cutting into the animal makes a person uncomfortable.
At any rate, maybe you can make a case to your Dad that you want to further your knowledge on poultry, who knows maybe you want to make a career in animal husbandry in the future. It's big business here big Ag, ensuring the proper housing, feeding and care for livestock - lots of jobs for animal husbandry specialists. Big dairy, egg and pork here.

And a necropsy is a scientific investigation not a freak show. Think of all the ‘medical examiners’ who feature in TV shows like Law & Order, NCIS etc etc.