I'm not saying programmers don't have other interests, just that programming is usually their main interest which leads them to build products targeted at programmers (there's quite a lot of empirical evidence to back this observation: just look at all the "Show HN" we're getting here). I think it takes at least a conscious effort to get interested by say agriculture, unless you were raised on a farm :). More people need to make that conscious effort. Interdisciplinarity is where the real money is at.