I think it’s basically a trope that lawyers have some of their own language. There’s a tendency toward double negatives- “I don’t disagree with you” and the like- but there are some ways in which the general language would benefit from upgrades.
|My bad.||Mea Culpa.|
|You’re a pain.||You’re quarrelsome.|
|This sucks.||This is not conducive to good trade.|
|This paperwork looks awful.||It’s inexpertly drawn.|
|bad idea (coming from a judge)||not favored|