Not so much necessary as it was a driving force. A bit like evolution, whatever caused our ancestors to develop eyes wasn't s necessary precursor,it was just so

Not so much necessary as it was a driving force. A bit like evolution, whatever caused our ancestors to develop eyes wasn't s necessary precursor,it was just something that was reacted too. There resulting solution being good enough to survive. There were many implementations of bicycles that never made it, those branches of development died off. However unlike evolution we can pick those up again and improve on them if we thought we could produce a better bicycle