Why we have to work individual
Just because something has worked for you and you found value in it doesn‘t mean it can be carried over to the whole population. That is a very closed-minded and self-centered approach that doesn't bring much success in the long run. It is important to understand that our bodies are dynamic systems that depend on a lot of factors. When you add intra- and inter-individual diffrences to this, it is very hard to understand why would people proceed to make such bold claims. Would you force a tall person with long femurs and poor mobility to do High-bar Back Squats just because you think it's the king of all leg exercises? Would you force a mother of two to go to the gym 5 times per week because you found that anything below doesn't bring progress? I hope not.