What if they decide to keep trading and losing money until they master a strategy that will benefit them in trading
If they decide something like that then still they won't be able to make profits as a trader because losing enough money will change their beliefs regarding trading and they'll somehow get a feeling that the market is always manipulative. I know some of them may become good traders but most of them will give up on trading.
I don't agree with what OP said because, for me, the best way to become a better investor or trader in Bitcoin is not about having your capital first or throwing money on things you don't know.
The best way is to learn first the Bitcoin especially since you are a newbie, you need to know how it works, and the history of it, you don't invest in things you don't know, that's very important in investing.