That doesn't make any sense, a person who does not know a market can never choose the right investment opportunity because you can only do that if you know about it unless you are lucky and you choose a random investment option and it turns out to be profitable for you, but that doesn't happen all the time which is the reason why a person needs to gain enough knowledge before they get into the trading part.

There are a lot of newbies these days who are making this mistake, they get into trading without any knowledge, they hear from seniors and see that they are earning money from trading and they think it's as easy as drinking water but they don't realize how difficult it is until they get into it and lose some money and then the realization hits them hard.