This curve is indicative to all financial assets and investments that have cash flows in future time periods. The value of a given stream of cash flows is objectively determined at a given discount rate. This is one of the biggest misconceptions in valuing financial assets. What they are disagreeing on is the amount and timing of the future cash flows, or to a lesser extent, the proper discount rate. If you value something, you desire to obtain it or keep it.
Different people can value different things or the same thing in different degrees.
For instance, one person may value a certain painting but their friend may not like it much or any paintings at all. They are acquired with money for the sole purpose of obtaining more money. One doesn't buy a painting in hopes that it produces more paintings, or marry a wife in hopes that she generates more wives. But, all people who make financial investments are desiring more money in return rather than less, sooner rather than later, and with little risk vs. a lot of risk. So, rational people can have an objective conversation about the value of financial investments.