More so.

This roof looks like a 2/12 pitch. So 2 inches of fall in 12 inches of run. That wouldnt effect a person at all. When I was building steel buildings out west this is the same type roof we installed. Corrugated sheet metal at a 2/12 pitch. A bity slippery when wet, sure, but dry you barely notice it.

Without going back and looking at the pics again, the roofs the snipers were on looked to be at least 4/12 pitch. So twice as steep and I think the reason the tripod had legs on both sides of the peak. On the shooters building you probably could have set your tripod anywhere on the roof.