Tell that to the multi-billion dollar advertising industry.
Having the perception of value is THE necessary condition to selling your product.
Having actual value may create this perception of value, but this is not necessarily so. I've seen several products including a few startups here on this site that I KNOW have great value, due to my own close observation. But there are many potentials customers who don't immediately see this value after casual review, or don't know about it.
