Clarification: “crazy” insofar as you, RP, define “well regulated” and “militia”, which is in a manner practically indistinguishable from a “standing army” (select individuals operating as agents of the state with state-supplied arms).
The most efficient route to a “well regulated militia” is to start with a “well armed citizenry”, from which militiamen can be drawn, already armed & familiar therewith.
Why? Does well armed mean proficient? Does it mean practiced in the arms of the Militia? Were those citizens out practicing with their musket once a week? Once a month? Once a year?
I don't see the connection. Neither did the Founders. They said training the general citizenry would be hopeless.