It comes with experience and having the right attitude. And though commercial pilots may log more hours than you do, most GA hours are far 'richer' in engendering experience. They are almost certainly 'hands and feet on', single pilot, short flights.
How many commercial hours are at altitude 'watching the automatics'? How many landings a month do you think a long haul pilot gets? Almost certainly fewer than many GA pilots! Don't sell your own experience short!