What you're talking about is better connecting with a customer's needs and promoting the product's benefits. There's no losers in that situation, just a customer with more facts of which to make their decision.
What that training manual is describing is exploiting someone's primal fears to manipulate them into something they wouldn't have otherwise done: apples and oranges.
A better analogy might be those beauty ads that call the customer ugly then offer their product as a solution. Seems both that and the Sunrun technique rely on primal fears and worries to get sales.