The consequences would be accounted for up front and paid out of the savings from using GPT.

Also it could possibly remove the (dreaded) on call aspect of it.

I think a lot of business owners would be relatively happy with automated instant answers, or get carefully considered answers in a week.

This is a good point. If the users know the difference the costs and benefits between using GPT and not using it then it certainly has value if those users are also willing to accept that not every answer needs to be 100% accurate.

In my experience business people often have a 'nose' for the right number and will bluff it out if the numbers are wrong and they're challenged.

Blue sky things or stuff you're putting in the annual report should be left to hoomans IMHO.