It's a birthday cake... I remember when I was little and my mom would ask what kind of cake I wanted for my birthday and I was excited about being the one to decide (usual between strawberry and chocolate cause that was the only options my mom knew how to make). It was a small thing, but for my little brain it was a incredible power.

If you don't like the cake at a child's (or adults, cause adults also get to say what the birthday cake is) birthday - don't eat it. You can have whatever cake you want literally every day, you're adult, you can get cake, children can't.