True, and I think this is the majority of peoples problems while training.
However, having the right diet is more crucial during a cut IMO. Simply because you have to balance everything better and you have to eat below maintenance, but its not as easy as starving yourself and hoping you drop fat. Its a much more complex process and harder mentally because you HAVE to be more strict with everything.
During a bulk though, simply put, all you have to do is eat above maintenance. Obviously optimally you want to follow the same rules keep everything strict and eat healthy, but when it comes down to it on a bulk if your eating the healthiest food possible but just not eating above maintenance you wont gain. So in that regard it is much better to eat fast food all day long simply to meet that requirement.
But as I said optimally, so that really isnt ideal. The point is a lot of people just simply dont eat enough either because there ignorant about their own maintenance level or they dont know how much they are taking in. And then they complain because they arent gaining muscle.
But then you can get into the macro levels...and thats just a whole other thing.
But to get back on topic I really dont think it matter what your reps are, I believe you get better and stronger at what you aim to do. Because squatting something 20 times, is much different then squatting something one time. or benching something 5 times, opposed to benching something 12 times. With lower reps I build more strength with heavier weights and endurance with heavier weight. With higher reps I build more strength and endurance with less weight, but more movement.
Obviously as the weight goes up, the overall workload is decreased to reach that optimal level of training. While lowered weight will have a higher overall volume because the weight isn't as taxing on the nervous system.
but nothing is going to happen with any of those unless your diet is there to fuel you and rebuild you. With Pre-post workout nutrition being the most important times besides breakfast.
Neutralyze
diet is huge no matter what your trying to accomplish......
6'3" @213
Squat 1x20x275
press:200, Deadlift:475, Bench:300, P.clean:235, Squat:385
"The only failure that is final is to stop trying to improve"