We need witnesses

Now- it’s much easier to float in quicksand than pure water- just as it’s easier to float in salt water. Lots of tiny particles to help you float. You CAN drown in quicksand. Flailing about or vibrating the water will cause the sand to move away and leave more water, the sudden unexpected loss of buoyancy can cause you to sink a bit, the sand settles back in and now you are restricted by the surprising weight of the semi solid sand.

Quicksand isn’t the danger many movies and fictions make out- it doesn’t actually suck you in like some vortex, and it’s relatively easy to get out of, and as stated is usually more of a nuisance than a real danger in foot- in a vehicle or carrying heavy gear it can be very dangerous though if you find a large and deep patch- but MOST isn’t that deep. In a survival situation wet feet, lost energy, and possibly lost shoes can be a real problem though. So like many dangers it is mitigated by the fact we tend to have resources of civilization to rely on. Even the common flu was once very dangerous. It’s sort of like that.