It may be tradition to stick your flag in the ground and mark your territory in business but times have changed. The way we have been generating work as of late is through establishing good relations with other businesses.
Once you can be sure that you have no conflict in interest there is much that can be gained from working with other people. even pointing a customer in the right direction if you don’t have the exact application for them can result in work swinging back your way.
Don’t let pride get in the way of pushing your business forward.