Confused about yielding?

If taoism is the art of adjusting to life, then tai chi is the art of adjusting to the opponent.
This process of adjustment is what yielding is about.
Balancing, sensitivity, change.

Yielding is concerned with not opposing force, making space... and then counter-attacking.

Having made space, you must incapacitate your attacker. Yielding is only half of the requirement.
Unless you neutralise the attacker, they will continue to assault you.
Step-in decisively and finish-off the attacker.