This is true, humans have been running for thousands of years without them.
> You wouldn't want to run a marathon in whatever the ancient greeks wore.
why not?
> Abebe Bikila (August 7, 1932 – October 25, 1973) was an Ethiopian double Olympic marathon champion. He won the marathon at the 1960 Summer Olympics in Rome while running barefoot, setting a world record.
He finished in 2:15:16.2
Or take Roger Bannister: [1]
> Sir Roger clocked three minutes 59.4 seconds in the historic race at Iffley Road Track in Oxford on 6 May 1954 when he was a 25-year-old medical student.
> The thin leather running spikes which weigh just four and a half ounces were snapped up by an anonymous buyer at the auction in South Kensington, London.
I don't know about you, but I can't run a 2:15 marathon or a 4 minute mile, and I don't think fancy shoes would make the difference.
[1] https://www.theguardian.com/uk-news/2015/sep/11/roger-bannis...