[inasmuch]

I think you're misunderstanding. This isn't an issue with noise cancelling or transparency mode. The issue is with the way the AirPods Pro mic picks up the user's dialogue (and surrounding noises) and relays/amplifies them to the person on the other end of a phone call.

For example:

Person A calls Person B. Person B answers using AirPods Pro. They begin talking. Person B decides to wash a dish in her sink while talking to Person A. Person A goes from hearing Person B's voice clearly to barely hearing it at all behind the seemingly amplified sound of the dish washing. Person B is none the wiser and doesn't understand why she has to keep repeating herself. Both parties hang up in frustration. Then they break up and enter simultaneous but separate downward spirals until neither can afford AirPods Pros anymore. Then they meet again and decide to talk on the phone. They hear each other clearly. Their lives improve. They can afford AirPods Pros again. The cycle repeats.