Geordi did eventually get the visor changed to ocular implants starting with FC. Which raises a whole other series of questions.
One thing that is being missed in this conversation about the genetic ban, is what would happen if the ban was lifted. The playing field would no longer be even as non enhanced cadets would be having to compete with enhanced cadets and would feel pressured to get enhanced themselves just to compete. Similar to how before steroids were banned, athletes had to take them just to stay up with athletes that did, since steroids are an incredible advantage in any athletic endeaver. Hence the reason for them being banned in the Olympics and all professional sports.
Actually, Starfleet Academy already seems ridiculously and unnecessarily elitist with its requirements.