The problem is that Lawyers are allowed on the Supreme Court. Lawyers are people who get their ego satisfaction from controling other people. They should also be banned from policial office.
You know, 98% of Lawyers make the other 2% look bad!
The problem isn’t lawyers. The problem is lawyers who are judicial activists for an evolving Constitution as a living document that suits their agendas.
That being said, there is no requirement that a Supreme Court Justice be a lawyer. The President, with consent of the Senate, can fill vacancies with non-lawyers.