[tmptmp]

I understand your concern about regulations being barrier to entry. But it's a hard (certainly not impossible) to solve problem. I can see that making the regulation less costly (e.g. by reducing administrative overheads wherever possible) we can reduce the cost of regulations themselves.

But the regulations the airliners have to undergo cannot be easily reduced. Aircraft manufacturers should have more stringent regulations than airliners. I'd not fly in a plane that has not certified to have passed all regulatory checks.