Is lifting an absolutely essential part of a mans life if he wants to have a high SMV?

The sports I’m passionate about don’t exactly build a substantial amount of muscle or an impressive physique like weight training does.

To add a lifting program to my schedule would hinder my performance in other activities (and vice versa) and would likely cause me to over train.

Does anyone else here not lift weights but rather pursue other fitness goals? How’s that worked out for you?

Please share you opinions on the importance of lifting for a mans SMV, compared to other sports that don’t build the same physique.