If you own the company, you are the bottleneck nobody dares to name. The payment batch waits until you are back at a laptop. The bookkeeper's question waits until you have a quiet moment that never comes. You carry the one device that is always with you, and your finance admin is the one thing that never reaches it.
Nance changes what reaches it. A payment batch arrives as a message you can judge in the time it takes to read it, and your reply is what releases it. A question about a customer or a charge gets answered in the chat, between meetings, from the car park. The work itself happens in your accounting system, with every action logged, and nothing posts or pays until you say yes. The phone was already where you ran the business. Now the books answer there too.