And IMHO the discussions about "kill your own dinner" are quite impractical because that simply doesn't work in most conditions from the perspective of hygiene and food safety, and slaughtering is a job that does require quite some skill to do it properly, having it done by amateurs can easily be needless cruelty if you do it wrong. Like, I can butcher a chicken or a rabbit, but I would not be qualified to handle a pig or a cow properly.
That might be for some people. There are many that would have no guilt. As you point out, some people know what is in a chicken nugget (chicken) but eat it anyways. This path might slightly reduce the number of omnivores, but I doubt it would have a serious impact overall. Like any reduction in consumption from them would just lead to a lower price and increased demand either domestically or internationally.
My friend will eat burgers and chicken nuggets all day, but a chicken drumstick with it's tendons and cartilage he is unable to eat, it is a necessary disconnect for him.
My tolerance is way higher but if part of ordering dinner was choosing a living animal for them to kill and prepare I would definitely just get tofu.