That’s only because of the size if the impact if things go wrong. You need a license too to build a house or drive a truck because it’s actually very easy to do it %99 of the time well but you can’t afford that %1.
I would argue that bus drivers have a much larger impact in terms of lives lost if things go wrong, yet they have significantly lower wages and require less training. The same goes for pilots and air traffic controllers.
How is it decided how many regulations are "enough" for a given field? It seems they are on an ever-increasing ratchet mechanism, often driven by mass hysteria.
Low affordance causes spilled blood, blood causes regulations.