Why aren't they discussing raising the voting age?

We have facts that the last part of the brain to develop doesn't until the mid 20's and that's why drinking,voting and fighting in war is too dangerous under 25.The only reason they let 18 year olds fight in war is mainly because of the fact that they are impressionable and not because they are "adults" and an older person would know how dangerous fighting in war is.The age of majority should be mandated 25 in every state.Repeal the 26th amendment cause that generation we didn't have the facts on the brain.