Accepting bitcoin for payment is a fantastic method to obtain bitcoin free of any KYC, so that's one thing that can be gained.

That will also help with reaching mass adoption as nocoiner customers who really want to make that purchase and are willing to absorb the friction that comes with acquiring bitcoin will then gain familiarity with bitcoin and possibly become hodlers, for one reason or another.

What that won't do however is maximize revenues for that producer. Some producers have the luxury of being able to do that. Most do not.

An alternative is for a producer to add a surcharge (premium) for those paying with fiat. (Or, offer a discount to those paying in bitcoin). This helps the producer earn some revenues in bitcoin, yet will result in few of the lost sales that a bitcoin-only payment policy would have. And it helps some start their journey into bitcoin, who might not otherwise, if nothing else because they made the connection between bitcoin being so desirable the producer was willing to take a discount even to receive payment with it.