>>28320>does someone know what causes this?
The chemical reward one's brain receives for engaging in a physical competition might register as a less compelling reward than a more chemically rewarding action.
The effect applies to all forms of highly rewarding sensory stimulation including visual, tacticle, aural, olfactory, and gustatory. This would also include any consumptive activities. Chemical reward responses to the purchase and use of all nearly all consumables have been well documented. It's some cases it's merely the act of purchase itself that provides chemical stimulation, rather than the result.