Yes, I think it's okay to abandon the big, established, stuck tribe. It's okay to say to them, "You're not going where I need to go, and there's no way I'm going to persuade all of you to follow me. So rather than standing here watching the opportunities fade away, I'm heading off. I'm betting some of you, the best of you, will follow me.
Tribes: We Need You to Lead Us (ed. Penguin, 2008) - ISBN: 9781440644504