At start nobody can analyse the market so they actually take decision by following the signals provided to them by experts. Sometimes with a single jerk person forget the benefits and left trading but they should be familiar that acceptance of such sudden jerk will make them strong.
But one thing is understandable that if precious time is given to trading and learn it well then one day a time will come when you will teach trading to others because newbies always turns into experts after facing adversities.
I compare it to making food really, you may not make a food as good as the restaurant near you, they may make a better one, but it will cost you more to eat it there than making it at home, plus each time you want it, you need to go there, and if they do not have any, or the chef is having a bad day, you are going to have a problem, whereas if you learn how to do it yourself, then you are going to eat at home, cheaper that way, and you can eat it anytime you want, you just have to cook it, and that means you need to learn to cook it.
Whenever one trades without information in the beginning, mistakes will be made and losses will be incurred due to mistakes. Otherwise, he can follow anyone and following someone means that if the other person makes a mistake, you will also have to bear the consequences of his mistake.Therefore, instead of relying on others, one should try to learn by oneself. If you can't make a good profit, at least you can avoid your losses.
The example you gave of cooking is a very good example that if one learns to cook by himself instead of eating in a restaurant, he can get home cooking easily and cheaply, but trading is a tough job, not so easy. As people think because it requires a lot of hard work and takes a long time to learn. However, trading requires experience, market volatility and knowledge about market risks. Everyone who is interested in trading should know about all these things, so that he can develop a good trading strategy for himself.