Because it’s extraordinarily effective?
He made it to the top of YouTube with it. If it’s the exact same thing as other existing techniques how come others haven’t been able to match his success with those classic formulas?
If you’ve only read my summary then we are discussing this with completely different mental models of what he actually does.
They do not describe the same process everyone else uses to make content. They are much more specific than that.
You seem to be of the belief that for anyone to be the most successful at this field they have to be gaming an algorithm. But perhaps there’s really no algorithm, or perhaps (my opinion) the algorithm is so good at showing people what they want that you can instead just focus on making videos people want.