Accounts payable is one of those jobs where the work is dull and the mistakes are expensive. Someone types the invoice in, checks it against the purchase order, chases the right person for approval, and posts it before the terms run out. Do that a thousand times a month and...
Most automation inside a company is invisible. A script on someone's laptop, a scheduled job three people understand, a chain of integrations nobody owns. It works until it doesn't, and then nobody can say what ran, what it decided, or why.