Bound To Get Criticized

Doctors are notorious for having messy handwriting. Could it be that the same gene that propels doctors to choose their career choice also causes them to have poor penmanship? It seems the solution is a lot more mundane. I asked a doctor who attends my daf yomi chaburah to explain this phenomenon. He simply said that doctors, who are often pressed for time trying to squeeze all their patients in, write quickly and sloppily to save a few moments. Can we find a Talmudic source for cutting down on the neatness of handwriting to save a few moments?
The Gemara (Bava Basra 164b) relates that Rebbe was examining a sh’tar mekushar—a “bound” legal document. This particular type of document is difficult to draft properly. It was instituted for use by kohanim to ensure that they could not divorce their wives quickly in the heat of an argument. A kohen is not permitted to remarry his divorced wife, so this situation was of particular concern to the Sages.