A person whose has a long standing fear of height most likely will not be aware of certain critical things they should do and not do, or what to do should something happen while in the stand. Obviously, since climbing to an excessive height and standing on a small platform may not have been something the person ever planned to do, the critical aspects that need to be known are things he or she probably have not considered, or considered in detail.
Like everyone else , heights dont bother me , the fear of falling does! I must say , from my experiences alone and others I know who are afraid of falling , we' re the ones who dont usually fall! The ones who normally fall have no fear which leads to stupidity! The ones with fear are extra cautious!