Whether LeFever. The art of explaining (№ 356447)

This is how the curse of knowledge. These people are so immersed in their profession, they are so well versed in it, be it medicine, Finance or cars that are not able to imagine how it is possible not to know. Professional vocabulary sounds natural, and they assume that you know all the others, but it is not so. The curse of knowledge prevents them to change their language to become understandable to the audience.