I disagree with you on how the real world works.
There are any number of violations of rules, or laws that have a different punishment for a first time offense than for repeated offenses. Warnings exit. Probation exists. Punishments for violating probation exist. Ratcheting punishments for repeat offenders exist. Going to the maximal allowable punishment right away is some old testament stuff, but not real world stuff.
You say, it is pretty simple, and I disagree with that, as well. It is actually quite nuanced. And part of that nuance is the NCAA's own complicity with the gambling industry, their history of hypocrisy with regard to the benefits received by the athletes (notice I did not say student-athletes?), and the recent trend of the courts and legislatures calling them on their hypocrisies.