I have a fear of heights. I am terrified of heights. I do not go over the 6′ height on a ladder, I do not go on my roof and I certainly did not look over the edge of the Hoover Dam on my Honeymoon. Ask my wife and she will tell you that I shouted at her to move away from the edge of the dam and scared the bejeebers out of her in the process.
I work in an industry with lots of ladders and heights and there are others with my phobia, I am not alone. Industries are very accommodating and from a safety perspective, they will not put you in a situation where you may freak out or freeze up and put yourself or others at risk.