Please my opinion is to take that advice with a pinch of salt because when you have spent years learning the skill of trading and it doesn't seem to go well for you, I advice you get some other skills that might work for you.
Agree. Trading requires specific skills, not everyone has the skills. Trading also requires a lot of time for analyzing the market trends and potential coins/tokens. If someone doesn't have these matters, it is better to focus on investment. Sure, trying for few years is surely enough to prove our ability in trading whether it is suitable or not. If we tend to get losses than profits, it is better to try another one (ex: investment).
The idea of wasting money in funding accounts for years is totally a waste of time and resources. Please reconsider because trading is not the only means of earning a living.
Yep, trading isn't the only way to earn money. There is another option, investment. Some people even prefer focusing in investment since the beginning because they assume trading isn't very suitable for them. Well, we can't force to do something that we don't have passion or skill on it.