>>1395375It's not all subjective per se. There absolutely have been studies. Of course you brainlets would know that if you bothered to get check any of the bullshit that the cycling media and bike shops tell you.
Here is one example.
Mornieux, G., Stapelfeldt, B., Gollhofer, A., & Belli, A. (2008). Effects of pedal type and pull-up action during cycling. International journal of sports medicine, 29(10), 817-822.
TLDR:
In conclusion, shoe-pedal interface did not have any influence on either the mechanical efficiency, the pedalling mechanics or the muscular activity during submaximal cycling.