I live in country (Pakistan) where crypto is ban and people hide there involvement in crpyto to avoid legal actions against them. The government here is getting more and aggressive towards bitcoin. The countries where crypto is not banned, you can ask anyone whether he accept Bitcoin or not. But still paying to plumber or any other merchant in Bitcoin is not ideal because of time it takes to settle the transactions. LN may be a better option to choose if you have to pay in Bitcoin. 

This can only possible in countries where Bitcoins are legal. Else if you ask for giving in Bitcoins in countries where Bitcoins are not legalised, then most of the time people won’t be aware of what Bitcoins are.

Bitcoin has spread and most people know about bitcoin, but what they care about is bitcoin profit, or they use it for the purpose of protecting assets from government tracking.  very few people consider it as a means of payment.  let's take you as an example, are you using bitcoin for your daily bills, or are you also accumulating it and using it to hide your wealth?  I mean, I don't think people will use it very often as a means of payment even if you live in a country where bitcoin is legal.

Sure, it's not a bad idea to go around asking people if they want to accept bitcoin when paying for things. Who knows, they might be interested and out of curiosity, they might even accept it. But, this is only going to happen if the amount isn't too big. Maybe for $10 or $20. I doubt someone who doesn't know much about bitcoin would be willing to accept $100 in bitcoin and take the risk of losing profit. And you might want to be cautious. Don't go around screaming you have bitcoin. Some might think you are rich and the next thing you will see when you wake up is that you are tied under a basement.
By the way, what made you think that a plumber wouldn't know what bitcoin is?

The water system in my house got some blocking issues and I needed to call a plumber, the plumber guy I was used to was not available, I called and he said he is far away, so I looked for someone else.

After he went through the problem and fixed the pipes for me, out of joke I gave him payment options that are available, if he will like any.

I asked him if he will want cash, bank transfer or Bitcoin, to my surprise he answered Bitcoin, I don't take this very seriously because, you know, most people don't care about Bitcoin here, but he brought out his smartphone and told me to scan the QR CODE.

I asked if he really his serious and he said yes, I had to pay him in Bitcoin and he said something that caught my attention.

He said people don't ask that's why he believed no one is using Bitcoin as payment.

He also said collecting cash will make him spend the money faster but he chose Bitcoin because he planned to start buying the following week.

While I was trying to question him about how he know about Bitcoin he revealed that he is a student, and that being a plumber is his side hustle, this answered my curiosity about how he knew about Bitcoin.

Have you guys been promoting Bitcoin by asking workers if they will receive Bitcoin as payment? How was it? This is actually the first time I will do such, all my mind was focused on, if I didn't see Bitcoin Payment Receive here I wouldn't bother.