I think you could just stop at "people use it". What kind of value they derive from it (if any) is another inquiry, and can't be discerned from merely observing the fact that they use it. At least, not without some really strong assumptions to the effect that people always correctly make positive-utility choices. It's possible people use it, but derive negative utility from it, and mistakenly use it nonetheless.
There are some very popular things (tobacco, say) that in most reasonable analyses produce negative utility over the long run! The problem is that people are not very good at utility-maximization, especially when the analysis involves more than one factor, some uncertainty, different time scales, etc. People are generally not good at almost any vaguely arithmetically complex operation (e.g. correctly using conditional-probability information in their decision-making, even when known).
That's one reason neoclassical economics prefers to talk about simply "price", rather than the classical discussion of both "price" and "value". Modern economics is the empirical study of pricing and economic behavior, and is agnostic about value.