[@Kafka Komedy]: That alone wouldn't be enough, unless his father actively exerted his influence and pulled strings to get the cybernetic legs made. However, getting bionetic leg replacements for him would be much easier, for something with equivalent performance to cybernetic legs, so it doesn't make much sense for him to get cybernetic legs over bionetic ones unless he has some specific reasons. One idea I have is that maybe your character was the victim of some disease or poison that caused his legs to rot away, which made him want legs that wouldn't be vulnerable to such things. Keep in mind that while cybernetics are unaffected by disease or poison, they do not have the advantage of self-healing that bionetics have, and thus must be manually repaired.