Heights don't scare me. It's the risk of falling from greater heights and being less in control of mitigating that outcome. Like others have said in the thread, trusting the gear makes most of the difference. I'm always iffy on a roof unless I have a harness, because well, it's not that hard to fall off!
People who have an fear of heights can't go near a window in a high-rise building, for instance. "Iffy on a roof, if I don't have a harness" sounds like no fear of heights.
Re: Ask HN: Any tips on overcoming fear of heights?
#31To be fair I "get iffy" when i look down!