The core theme is that the Federation provides individuals with agency over their bodies. Sure, Geordi’s mother could have had his blindness cured before he would have known anything different, but it’s his body and ultimately his choice. Interestingly, we see the opposite with Dr. Bashir. His genetic enhancements don’t just offend the Federation because of historical trauma with the Eugenics Wars but because his parents didn’t even give him choice in the matter (at least, that’s how I’ve interpreted it).