But even then, the forces of egotism won't be understood. Only mindfulness can do that. If mindfulness is not there to look into the lens and see what has been uncovered, then it is all for nothing. Only mindfulness understands. Only mindfulness brings wisdom.
Concentration has other limitations, too.
Really deep concentration can only take place under certain specific conditions. Buddhists go to a lot of trouble to build meditation halls and monasteries. Their main purpose is to create a physical environment free of distractions in which to learn this skill. No noise, no interruptions. Just as important, however, is the creation of a distraction-free emotional environment.