I think everyone should stop worrying about a draft. Isn't a draft to ensure sufficient bodies to man a war? That's what a draft is for, isn't it? I think there is plenty of volunteers for our military. The last time I checked we weren't running short on people in our military. And if we do run that short that they need a draft, the only thing that will help you then is praying. So there is no need to worry.
You have a good point. People fail to see that not all reserve forces are activated, they can be if there is a need. Not to mention there are programs set up to get people from other armed forces groups to shift where there is a need. Example: The air force "blue to green" program puts air force troops in the army.