In another life when I worked at big companies full of huge egos (the entertainment business) I often observed that people who are famously successful at one thing believe they are geniuses who are experts at everything. When they start meddling in things they really don’t understand they almost always screw it up.
Let’s just say there are very few Leonardo DaVincis around these days but many very rich (mostly) men who think they see him looking back at them in the mirror every morning.
Here are two of them: