Monero is cash and can be treated as such. With Bitcoin a business is required to KYC and if any part of a transaction has what the authorities consider to be taint then your entire transaction can be frozen and the coins confiscated from you and the service not rendered. No thank you. That sounds like a horrible way to conduct business. Besides, custodial equals IOU and IOU equals can be removed at any time for any reason. 

 Your arguments are good, however if they did work no one would use banks. Unfortunately, all businesses I know have at least 1 banking account. 

 That's because until now there's never been a choice other than holding a ton of cash at your business, physical location, which is inconvenient and quite frankly dangerous.