The next Awful Truth is that training for hypertrophy is not dependent on high-rep sets with little rest. It is dependent on muscle growth, which is facilitated by forcing the use of heavier weights over time, and far more efficiently accomplished with sets of 5 reps. Muscles get stronger by increasing their cross-sectional area, by adding contractile protein. I'm not interested in the precise mechanism, because I don't have to understand the details of the mechanism to observe the phenomenon. But I've observed the process of getting bigger for decades – if you drive your squat up from 135 to 405x5x3 and your deadlift from 185 to 495x5, you got a lot bigger. Because if you didn't grow bigger by eating enough protein and calories, you never got to these numbers. And these are not crazy numbers that require the use of drugs, but rather normally accessible progress for normal males with a couple of years of correct training on sets of 5.
The process of getting stronger makes you bigger. You already know this. So stop pretending that light weights and high reps are how you get huge. You don't want to train heavy? Fine with me. But doing light weights for high reps gets you stuck. You know this too.