Why doesn't Cassius go directly to philippi?

Cassius doesn't go directly to Philippi because he believes it would be strategically unwise to engage the enemy on their terms. He prefers to wait for the forces of Brutus and himself to gather strength, hoping to draw Antony and Octavius into a more advantageous position. Additionally, he fears that marching to Philippi might lead to unnecessary exhaustion of his troops, which could compromise their effectiveness in battle. This cautious approach reflects his desire for a more favorable confrontation.