Absolutely we want everyone to reach as high as their abilities allow them to! A unicorn would be fantastic! A lot of what we say should be preceded with “until proven otherwise”. As we believe in data and statistics, we assume the median type outcome as the placeholder – UNTIL PROVEN OTHERWISE. I.e. once you have evidence that you can do better and reach higher than the typical/median case, then raise the bar! But you need to prove you can walk until you try to run. And until you have proven your ability to run, you should stay on a route where running is not mandatory.