I do notice that some people naturally don’t allow bitcoin in any of their daily transactions
Totally wrong. You misunderstood it. People can not allow or disallow bitcoin and bitcoin transactions. Miners do it because bitcoin is operated by
Proof-of-work and transaction will be confirmed by miners, not a person.
I believe he is referring to accepting Bitcoins in their daily sales transaction, and not the Bitcoin transaction flow in the system itself.
Many people avoid Bitcoin because of ignorance. Aside from that, other merchant wanted to stay in their comfort zone of just thriving in a traditional transaction of fiat money. They don't want to bother of implementing any additional mode of payment because it requires them to spend more resources which they are avoiding.