[mojo_juju]

"All these stories from indie hackers are like stories from people who won the lottery."

I think it would be more of a spectrum, considering success isn't necessarily "won". It's a confluence of controllable and uncontrollable factors.

The results of which represent a spectrum of value (output) and input (factors).

Age is merely one of the factors involved in human productivity, and not necessarily the most important (the equation of coefficients affecting each factor would change over time of course).