If one who teaches is called a teacher, and one who writes is called a writer, and one who farms is called a farmer, why is one who sues called a lawyer? They should be called suers!
If an experienced carpenter is a master carpenter, and an experienced mason is a master mason, then an experienced fisherman, one who is very good at baiting fish hooks, should be called a master baiter.
The ones who sues, and the one who uses the tool of law to assist, are two different people. The law-yer uses the law, just as a saw-yer would use a saw.
But I like “suers.” Makes me think of the sound attributed to calling pigs: “Sooooeeeee”