Alright, how about this: fail to register with selective service, and young men cannot get or renew a driver’s license or financial aid for college. They can even be charged with a crime, all for failing to follow one of the very few regulations imposed upon the militia.
How can they be punished for not fulfilling their militia duty if they are not militia?
I started by asking “who is the militia?”, nothing more. The legislature told me who they thought was the militia (every able bodied male citizen aged 17 to 45) and I asked why women weren’t included. Then I realized the definition the legislature used was not the definition used in the Constitution, and I allowed it to expand to as broad a concept as Congress would have access to: everyone.
Your interpretation of “no training, no militia” is not unreasonable as a practical matter, but we are talking about constitutional law, constitutional rights. If there are any rights attached to the concept of “militia”, liberty demands we assume the broadest reasonable interpretation; if there are any infringements attached to the militia, the narrowest definition possible.
“Well regulated militia” is not the “gotcha” that hoplophobes think it is.