The engineering of flight is something that's achievable through simple understanding of physics laws and principles. Birds did not engineer flight, we did, and

The engineering of flight is something that's achievable through simple understanding of physics laws and principles. Birds did not engineer flight, we did, and we were only able to engineer a crude version of it. The natural abilities of flight in birds are still superior in many ways to engineered flight. So, how can we assume from this that we'll be able to build a version of ourselves that's completely more intelligent? Humans engineering functional variants of inferior species' physical capabilities is undeniably incomparable to humans engineering a better, more intelligent version of ourselves. Maybe, a beneficial albeit simpler version can be engineered, but one that makes us obsolete? It's hard for me to conclude that's not a huge leap in assumption.