My experience is that the scale doesn't move very far without taking bodyfat% with it. In 8 years, I'm yet to find a way after the first few months of training to gain any visually recognisable new muscle mass without gaining fat with it, ultimately requiring a cut as a result. Attempting to build muscle without gaining fat resulted in me remaining skinny. After noob gains, nothing happened to my muscles until I did accept fat gains.
Do you have experience to support what you're saying? Any photos, or at least measurements to demonstrate that doing it the way you recommend gets good results?
I went from 70kgs at 19 to 100kgs at 30 without going near 15% bodyfat. I did cut for bb comps a few times in the first 3 years but then I just ate and trained. Then I left town and stopped training and my bodyweight dropped to low 80s. When I started training again I went from 83 to 107 in 5 years but I was a bit fat at that weight.
The critical variable is how much you eat in my opinion.