What happens if you dont eat enough dairy?

Nothing. There are many people who cannot consume dairy, and others who choose not to.

There are many healthy vegetables that can give you all the calcium and vitamin A you need.
Dairy foods contain Calcium. Calcium is necessary in building strong bones, and teeth, all sorts of hard body bits!

A lack of dairy products may lead to a lack of calcium, if other Ca sources are not utilized.

Lack of calcium may lead to disease, especially Osteoporosis, a disease which makes bones weak and prone to breaking.

you might killl urself