you are completely correct Al.
the insulin spike that people fear and dread on these boards is generally in the context of overweight people who are trying to shed fat and not add muscle. You are correct that if you are looking to add muscle you need to properly feed recovery post workout. This is the ideal time to consume organic whole milk, carbs and foods that raise insulin levels in order to transport nutrients to your muscles to use for recovery.
This is in context to adding muscle mass. if you are looking to maintain or simply live healthy it is not necessary. Remember though that you don't get stronger by exercising/lifting you get stronger by recovering from your exercise/lifting.