Singu is just caught up with trying to deny the obvious reality that people have natural talents/strengths and weaknesses particular to them, to the point where he thinks we all basically have carbon copies of our hardwiring inside us and we're only defined by our experiences, if even that, because we can all do literally anything equally, including things like shooting fireballs outside of our asses.

Probably butthurt still as an adult over some early experiences where people told him he sucked at certain things and then he magnified it and internalized it forever.