Hey Blakey, I think you've worked it out already that I'm not a judgmental person, so with that said, let me share this bit of info with you sir.
I 100% agree with you (even though I've never taken insulin myself), that insulin does exactly and in the manner you've brilliantly described it above. However, did you know that there is another way to get that result without taking insulin? We both agree that insulin is the Bus (and Boss) that shuttles all the goodies into your muscle fibers. So how can we get that same action happening without (if we choose to) not take insulin? I've written something about this back in 2009, however now in 2016, I've giving it bit of a twist, and I'm sort of discussing it with Big R (Repacked) in the bodybuilding section of this forum.
I'm talking about doubling up. That is to say, to maintain a high level of protein synthesis going, as well as (and this is where you come in Champ), injecting some much needed nutrient filled blood directly into our worked muscles, we double up, i.e. we train today what we trained yesterday. We do that, but we focus on a totally different number of repetitions; repetitions that would elicit a tremendous muscle pump, gorging your muscles with heavily filled nutrients rich blood. Can you work out the critical factor here? It's your eating from the time of your last workout, until you're back in the gym to smash it yet again. Smash it not with high load low or lower reps, but rather with 20 to 30 rep sets and a minimal rest in between (say 1 minute). This is what you call directly feeding (or "spoon feeding") your hungry and stressed muscles.
Something to think about for future workouts if you're interested Blakey. Look after yourself Tiger.