There are differences in every restaurant. (Some good. some bad)
Because you disagree with someone, or your better informed, doesn't deprive them of their opinion.
Over the years I've ate BBQ at places where they had no education, they just did it like they do it every day. I have tasted amazing BBQ from folks who were taught by their family. They knew next to nothing, other than to cook things like they like it cooked...
I would have tried their BBQ.