That's an odd assertion. Sure, we have a somewhat higher tolerance for risk for unmanned spaceflights, but we don't have particularly high requirements for unmanned drones either. But the reliability requirements for something like Starliner are ridiculously high and that's why it's taken a decade for the first manned flight.
A starliner is not nearly as reliable as a Boeing 777. Just look at what happened to the space shuttle. That’s also why Russians had reliable launch vehicles but not so reliable jetliners.
Those "unreliable" jetliners still complete orders of magnitude more flights between crashes than "reliable" launch vehicles. Angara A5, Russia's latest and greatest, had 1 failure out of 4 launches so far.
The lifetime requirements for a lot of components even with crewed capsules and human-rated launch vehicles is an order of magnitude lower than aircraft.
“An airliner has to survive 13 hours in the air. A rocket only has to survive 13 minutes.”
