The main argument is that it's beneficial to homeowners. How much a company makes off of something is not relevant to consumer choice.

If Apple were to say hey everyone buy these iPhones instead of Androids because we're going to make money, that's not really a reason to buy it. Vs buy our iphones because even though they're more expensive at first, the battery lasts longer, or our phones are proven to be more durable so they will last you longer, or there's a lifetime warranty etc. idk I'm making up loose examples. It would be much more relevant to have that information.

Or another way to think is that the question says what is the LEAST useful. which doesn't mean that it's completely useless. It just means how useful is it relative to other options. And also it is more helpful when making a decision as a consumer to have a comparative price analysis and also to know how well something works.