I am afraid I am feeding a troll, but that is complete BS. It is a shitty job, since you have to get up at 5:30 in the morning and get paid very little for beginning crew, but it is not useless. Flight crew is needed to evacuate 200 people within 90 seconds in case of fire. They are needed to extinquish fires on board, if you don't everyone is dead (lithium laptop batteries are extremely nasty). They are neede to calm down drunk and annoying people, the legal limit is 1 crew per 50 passengers, so this requires a lot of social skills. They know how to handle a potential hijack situation. They are needed to serve you drinks, clean up people and toilets when someone throws up. They are fully trained to perform first aid to keep you alive until the plane can land. Source: a good friend flew for 8 years herself and now trains 18-20 year olds in 6 weeks to become a fully qualified cabin crew member.