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