Will firing a coach and promoting an assistant to interim coach really increase ticket sales? How much will that coach be able to do mid-season to improve the team? You still have to pay a guy to not work, which is bad business. It's not paying a little to get rid of them, it's paying them the exact amount as it would be to have them stay.
Here's a better example. If it doesn't make sense, then certainly you should avoid going into business. If you're the Knicks and Isaiah Thomas and/or Scott Layden is your GM, does it make enter financial sense to fire him or let him continue his job, as you'll still be paying for him anyway? Do you get what you paid for or do you eat the money by firing him?