Most people aren't calling it a brilliant insight. Most people are just saying that it's a reasonable point.
When I'm selling my widget I might think that £2 is insignificant, and is the same as a cup of coffee, and billions of people buy coffee every day, so why don't people spend that insignificant amount of money on my widget? Well, emotionally, £2 is not insignificant.
To get someone to give me £2 I have to overcome some barriers. One way is to compare it to something that seems insignificant, such as a cup of coffee.
That might have worked so far, but at some point people are going to catch on and it's not going to be as effective and I'm going to have to find something else to try.
This article is an indication that people are starting to resist the coffee comparison.
But I do hope it doesn't become the new "you're not the customer you're the product", because that's overplayed.