I asked the same questions this year. The reason he wanted to stay down is that he is small. He is running in the 310lb class with weights bolted all over the kart. I don’t have a problem with it.
We have the opposite problem with a driver who just turned 14 and 5’10”. The scales aren’t kind to us. We will probably waiver up next year.
It’s too bad that you didn’t come to the race at Grange. Said driver charged hard all day and won the main. That’s his first win since he started karting. I was glad to see him do well. With that under his belt, he may consider moving up.
Why does this bother you so much? You said that you were moving from karting to cars.