Specifically, there are two major issues with it:

I can't say either of those issues really hit home with me. It would be all about doing it better than the other side. There isn't any downside to being conscious of the cultural and social context of the area the case is in. Its all about gaining a slim advantage. If it's 1% or 2% that is still a gain. I'm sure he can overplay its usefulness or effectiveness, but the fundamental concepts are pretty much self evident, so long as you acknowledge that juries are biased and will have preconceptions/make decisions swayed by politics.