I actually have done the angels landing hike a couple times it is beautiful and by far my favorite trail i have ever done, the photo you have up is actually taken from almost the same exact spots i took a photo.....i have pics in a post i took of different locations on the hike showing the chains and sheer drops.....

https://steemit.com/photography/@mike.boatright/angels-landing-zion-national-park-utah