If there are strong line possibilities, then these should be counted as well. Note that the approach of counting corners does not take into account their position relative to the rest of the playing area. It is possible to have only a single corner and be able to win the game, or have many corners yet have a relatively weak position. The strength of a position also depends on who has the initiative. This is one of the most common strategic errors of new Trax players.
Corners represent attacking potential.
However, by making an attack prematurely, you actually weaken your position. The reason for this is twofold. First, when you attack, you use up a corner, reducing your potential. Second, when your opponent defends, they can usually do so in a way that gains them a corner. So, in general, you not only weaken your own position, but also strengthen your opponent.