People like calls because there is no accountability. "Oh, I was just spitballing" or "This is how I interpreted what they said despite doing a left turn at Albuquerque". An email or memo can be skimmed, or searched, for context thereby holding people's feet to a proverbial fire. Even if a call is being recorded for posterity, each party on the call runs the risk of inciting the ire of whoever was forced to listen and judge both participants. Nobody wins because someone was forced to listen to ten minutes of meaningless crap that could have been an email, much like a YouTube video intending to be helpful but has 5 minutes of sponsor shout-outs, like, rate, and subscribe, an unnecessary explainer before getting to the topic at hand that some Bulgarian uploaded ten years ago and lasts fewer than ninety seconds.