It's a good thing, your neighbor did. And it's great to see small business embracing an other payment option to their customers. By doing this, he is not only catering to customers who actively use Bitcoin, but also promoting awareness and adoption of digital currencies in your local area.
If I'm going to buy $10 worth of items in the store why should I have to wait ten minutes on average and pay a 20% fee if paying with cash I don't pay fees and I don't have to wait.
Using LN would make more sense, but you would have to open a channel with each customer, so neither.
Even though people don't pay or purchase goods from his store using Bitcoin because of the high cost of transaction fee, I think he has actually helped a lot way in promoting Bitcoin adoption. Even a passer-by would be interested in knowing what bitcoin is about. And I think that if more ideas like this is promoted, that is Bitcoin flyers and bill boards are made available in our local areas, it would also go a long way in promoting Bitcoin adoption.