I think, at this point, you're doing more to harm Genz Benz than benefit them. You clearly like their products, but your attitude towards people who either don't know how to or don't care to change tubes out of a brand new amp is surely turning people off to the idea of owning a Streamliner.
GB has been nothing but gracious in taking care of people whose amps are failing earlier than anticipated. I agree that someone shouldn't purchase a tube amp with the expectation that they will never have to replace a tube, but I also agree that people should expect their brand new products to work. How people choose to approach a product that has failed almost immediately is their decision alone. If you care to advocate for tube swaps versus returns, then provide tutorials and positive feedback in place of criticism and derision.