Merchant always honor buyers payment method .. for example they accept credit cards though there is 2 percent fees ...to give me 1 percent cashback :-)
Discussion
That's because you have market power. You're buying low quality, mass produced, interchangeable widgets.
There are things where the merchant commands market power. Anything unique, high quality, difficult to replace, bleeding edge - in those cases, the one who has the thing has power.
Bitcoin shifts that back - since it is scarce, it can buy scarce things.
Holding bitcoin is pure power. The merchants that aren't dipshits will do anything to get it.
Sure ..such merchants can always convert fiat they earn to bitcoin .. why would they force customers to pay in bitcoin and taxes on behalf of their customers!
We , the normies , don't spend a penny more than we have to .. most our time goes in finding which store is selling widgets a penny cheaper .. and which gas station has ten cents less on the pump !