[lukan]

"In modern world you have to be careful and watch out for sharp objects, all kinds of garbage etc."

Also in the pre modern world. Spikey plants are in many places and my feet regular hurt in summer.

"but even the holiest of people would wear shoes when going on rough terrain"

Unless when done with purpose. It is a good awareness training, walking through the bushes barefeet. One moment of distraction .. ouch.