no you can't but neither can you take risks with peoples lives using the justification of making money.
You certainly can, and every commercial organisation does it every day. It's just the level of risk and the mitigators that vary.
As I said, buses, taxis, theme park rides, just getting in the car to drive to work can all be fraught with danger - why should aviation be a special case?
You can't be cavalier about it, of course, so you need to take sensible precautions and give people fair preparation and warning for what they're about to do, but you can't expect pax for a 10 minute reef scenic to be put through anything more than a safety brief and demonstration not unlike the one the cabin crew give you in an airliner in terms of complexity, really.