Edges are dangerous most of the times. They hurt you as well. Sitting on the edge is what you won’t like to do. That is because you never know when you will fall. For an acrophobic person, The one who has fear for height, this is almost like a suicide. Without even attempting a jump he will be falling down from height just because of the fear for height.
Some years back, before joining to my first job, I was an acrophobic person. i used to fear by the heights. I was unable to go near the edges of anything high. imagine the cautious slow steps towards the edge going inch by inch. After joining the first job I had to climb the scaffoldings and the roof slabs for checking purpose. This is when my fear started fading. It still exists but to a small extent.