It is great to buy things with bitcoin but many merchants are just negative to accept bitcoin due to its volatility. During the last great price drop from 20k$ to 6k$ many merchants have suffered from huge losses due to the price drop. And that is why the number or merchants have decreased and even huge businesses online have started to decline the use of bitcoin due to their losses.
He already posted a proof. Yet your resisting his piece of evidence for the sake of hating Bitcoin.