Another aspect people forget is that many who run barefoot developed/grew up running barefoot, which gave them years to adapt to the lack of cushioned shoes or whatever.
A trained runner who switches and doesn’t give their body a lot of time to adapt to the change and tries to maintain their previous volume/intensity is going to get injured more likely than not.
Because they are going to get a ton of stress thrown onto tissues that are not adapted to it.
Lyle