Who is 'we'? And yes, you are always in a bubble, and so am I, since your brain can't comprehend more that around 150 connections. I believe 'preaching do your own choir' could be very helpful in the beginning of your product development. Once you get traction, you can start shaping it into a more 'mass attractive' version. My idea is, we are always in a bubble, so we might as well use it wisely, because that is a place we know very well. And every now and then take a trip to a place that you feel very uncomfortable with can be an insightful experience and open yourself up to a lot of new opportunities.