This was mentioned in the talk given by Steve Densley and Garet Giles. There are numerous reasons given for people leaving the church. While your personal experience,, or even the experience of your friends, might be best addressed by one group of speakers, there are others out there who have different issues and interests. We try to mix it up. And yes, we get hate emails from both sides. Even this year I got emails saying our speakers are too liberal and emails saying our speakers are too conservative. Of course, this was before anyone spoke at all.
I just hope to pick up something from every speaker. I don't have to agree with everything they say, and I often don't.
I hope people don't throw out entire talks because of one or two items in the talk they disagree with.