For me, full-on carnivore is too much. I tried it, and it’s helpful, but I too felt that it got in the way of enjoying a regular family meal, almost daily, with the kids.
Optimal health is having dinner together as a family, and you can still manage a keto-friendly diet that way. So enjoy the pizza day! Additionally, there seems to be some benefit in allowing your body to experience a little inflamation and stress from time to time, which is why fruits and veggies, in limited quantities, can be beneficial for most of us (if you can find mostly clean versions of said produce).