Sure, but if you've got a choice between a carrier who has a satisfactory rating and one who has a conditional rating, guess who is the safer bet.
Also, if their rating is a result of a bad audit, then I would guess that means the MTO found several problems during the audit. They may not go under at all, they may remain conditional for years, or they may get their act together and dig their way out of the hole... But for now, they appear to have some safety issues and it's best for us all to keep our risk to a minimum.