If you take on the perspective of holding the world as temporary ward, preserving it for the use and pleasure of future generations, then that easily dismissed single person missing experiencing something becomes an uncountable number of humans no longer able to do so. While there is certainly a balance to be struck between using our resources for our current needs or amusements and using them to safeguard the needs and amusements of those to come after, your perspective of dismissing it out of hand veers far too much to the side of disregarding those that will come after us entirely.