Subtracting position vectors in different directions is valid as long as they are treated as vectors. Specifically, when dealing with directions like East (E) and West (W), one can subtract them since they are opposite vectors. For example, 10 units E minus 10 units W results in a total of 20 units E, illustrating that the net displacement accounts for direction. The discussion emphasizes understanding the physical interpretation of these vectors in real-world scenarios, such as driving distances. Overall, the key takeaway is that directionality matters in vector subtraction for accurate net displacement calculations.
