If we only think about profits at the start then that's clearly not good, because it can make everything fall apart, like with the patience you said. Of course, if at the beginning before trading we think about profits, that already indicates that we are impatient, whereas to trade of course we have to be patient. It is very unlikely that we can make a profit if we only think about profits without thinking about other things.
I agree with what you say, even with big traders who are experienced if they trade and lose patience they can experience potentially large losses. therefore we must be as patient as possible to get good results. and I think the problem is patience, where many people are of course impatient when it comes to profits.