Legal writing sage Bryan Garner says yes, and lays a lot of the blame on law schools:
While lawyers are the most highly paid rhetoricians in the world, we’re among the most inept wielders of words. Stop and think about that. The blame goes primarily to the law schools. They inundate students with poorly written, legalese-riddled opinions that read like over-the-top Marx Brothers parodies of stiffness and hyperformality. And they offer law students little if any feedback (on substance, much less style) from professors on exams and writing assignments. But there’s plenty of blame that falls elsewhere. Writing standards have consistently fallen over the last century in secondary and higher education. (It would take a full-scale book to unpack that set of issues.) For law firm associates, their senior lawyers too often decry any emphasis on writing style (“I’m just concerned with the substance of it! I leave style to others!”). And in general society, serious readers are becoming an endangered species.
