Many don’t believe I am petrified of heights, when I fly planes, I can only use a step ladder, not the tall leaning ones, I don’t like windows or edges of buildings though I can stand on a cliff and look over, somehow I figure it’s been there for a million years or more what can go wrong. I cannot ride show rides, coasters etc. I have done aeros ( with someone else flying) and loved it. My brain knows planes don’t fall, ( unless catastrophic failure happens, then you are just sh#t outta luck) and I treat where I am sitting as zero height.
when I was a kid I couLd climb trees, and we used to walk along the top of the water pipe in the cataract gorge in Launceston from our suburb right into town wheeling our box bikes, fairly high up. It came along later, maybe a health fear of splat!