It is the only sane way to handle things like this and I think it is the reason air travel is so secure that most regulations and practices make sense.

You want the crew to be fully in charge of security. If they think the plane should turn around, it turns around. In the long term it is way cheaper to eat those costs then to start a whole industry about litigation for events like these, probably causing everyone to buy additional insurance etc.

You definitely don't want to give any incentive to anyone to "overlook" possible problems.