That is somewhat true in big firms, but if you are a solid legal writer, the higher ups won't have to edit your material as much and you will get rewarded with better assignments. Plus, at some point you will be the person supervising or be at a smaller firm without a team to write a brief. Good legal writing is required for everything, from briefs to memos to letters of compromise. Being a poor legal writer is a sure way to get endless document review or other assignments that don't require any writing. Partners and other lawyers don't have time to correct your mistakes or to rework your research. And I think attorneys should take some personal pride in their work product. Attorneys are, to a great extent, professional writers. Bryan Garner says that a lot, and I agree. And it wouldn't make sense for a professional writer to be bad at writing.