With the right psychological mind set can a trader make it with just random signals rather than spending too much time understanding all about technical and fundamental analysis?

I've been wondering how some traders suddenly become consistently profitable in a very short length of time compered to others. Some 2 years, some even in the first year with simple basic technical strategic Ideas while some spend 5-6 years or even more before becoming consistently profitable. And some are even making it with just copy trading systems.

Does it mean one could become consistent in the market learning just a few trading tips with well structured psychological behaviors?
What brings about consistency? Good psychology or years of experience. What do you think