First of all, explain what you meant as psychological trading.
Is it a type in which a trader will trade without having any bases of analysis? If that is it, it means the person is just gambling. Or does it mean a trader will not trade at all until the price of bitcoin has fallen so significantly? That is a good type of trading if that is what you mean.
But this would be good only for swing traders and holders. As for scalpers and day traders, technical analysis is very important.
When you mentioned gambling it made me feel this way;
Do you ever know the outcome of a trade from the beginning? The market is a space of random variables and that's a gambling feature. The good thing in trading is we are able to put the variables to our favour with some sort of trading skills yet we don't win all the time.
Have you closed a winning trade at lose? That's because you tried escaping this feature of the market but the right psychology would make known all these facts to your thoughts about the market. Without good psychological behaviors it's difficult to remain disciplined (follow your risk management plan) in the market.
So in as much as you are very good with your TA+FA I think it's also necessary to maintain good behaviors in the market.