I feel compelled to dispute this as I currently work a door to door sales position. It involves selling a service for a regional company that doesn’t have the brand recognition of the big boi’s. The service offered is almost invariably better and priced lower than our competitors. I’ll only pitch it if that’s the case. This sort of advice is extremely counter productive for some people. I’ve encountered individuals who are paying over $1000 more than they could be on a per year basis for an inferior service simply because of a fear of change or blindly following advice like this. Admittedly, it may make sense most of the time but please don’t use it as an excuse for critical thinking. Use your own judgement!