I have a 15 yr old and usually extras. Mine isn't eating whole 30 but for dinner she eats what I do as do the extras when they're here. The policy my parents laid down for us was you didn't have to clean your plate and you didn't have to eat everything. You did have to taste everything and you were allowed to spit it out if you didn't like the texture. I've raised my daughter the same way. There were things she didn't like at 4 but has re-tasted and decided she like.
My current way of thinking, if it isn't good for me, why am I feeding it to my daughter. I just keep making little changes to our kitchen and her diet. She does connect the 2. They do learn if we provide the knowledge.