You have got to be kidding. Corrupting data for a sale already made is far worse than losing a sale because of an outage.
I mean, this is still arbitrary. There are millions of small businesses worldwide that do fine with terrible records, but making on-going sales.
If you don't make any sales because of constant outages, you could argue that's worse than trying to deal with corrupted data, especially if you have log files or some other method to recover corrupted data anyways.
My point is that the very root of what gives software value is something deeply industrial -- it is a machine that can do something over and over correctly, reliably and without regressions. If you take away that reliability to be depended upon by a business, you are no longer building an industrial strength solution -- you're building a toy.
As long as you have both covered to a reasonable degree within your company/team it’s a waste of time arguing who’s got the most important info in their brains.