I've considered it, but I figure that the value of having it outweighs this. I don't see it as something that is strong enough to draw too many people away from the site.

I would caution you against the Typical Mind Fallacy and believing that other people will perceive writing the way you do.

In projects I've seen, the founders and marketing people worked on marketing copy, and spent a lot of time fine-tuning the messaging. As as programmer and a LW reader, it is unlikely that you are well-calibrated about marketing and messaging (similar to how the typical marketing person would be miscalibrated about web development). Getting feedback from others is important to avoid biases in this area.