I honestly was wondering if the person also meant things thst are currently illegal when they said adults should be allowed to do "whatever".
Saying "adults should be able to do whatever is legal" is a truism: you are by definition allowed to do anything that is currently legal, so it's pretty pointless to write a message supporting that. Thus, me asking for clarification.
You are the one who stepped into the conversation, told me to join the military, and acted strangly aggressive.
As said, that's a truism. What possible reason would one have to say it?