These builders work at heights most of us would find terrifying, constructing the bones of an edifice that thousands of people will walk through and work in without the least concern. They understand that all you need to move around safely is a place to put your foot for the next step.
What girders form the basis for your stability? What do you stand on as you move through the world?
I trust my gut instincts to guide me and rely on my personal theology to smooth out the rough edges. BTW, your picture is either outdated or from a place outside the USA. We have strict fall protection guidelines for workers these days. Nobody free climbs anymore, at least not legally.