Not certain why you ask, but I found the rebar and rungs to be of great aid. Where they exist, you will have no issues. Where they don't exist, you will curse and ask "why not". We used to speculate how many people got hurt on each face for the clubs to decide to put the bars into the rock. Hikers have lots of time to understand the great mysteries of the universe.
Most of the hikes here are going up the mountains and include at least a small portion of ironways.
Some of those mountains can't be climbed in deep winter and heavy snow unless you're a serious Alpinist, but as soon as at least parts of the iron pieces got surfaced by the snowmelt or wind exposure, this will help the more adventurous hikers to access the summit.
I'm not sure if the rebars and ladders in summary help reducing the % of accidents and fatalities, or increases them.
It brings way more hikers to the summits and back down to the valley safely, but also increases the total number of accidents.