Tell me one valid reason why this is the case and I will donate you 100 NP$.
AlphaCDC.com was registered in 1986 and USA.com was registered in 1999. Does make AlphaCDC.com more valuable than USA.com?
While older domains tend to be more valuable on average, this does not at all imply that age is the source of their value. That's as ridiculous as saying "People are more likely to drown on days they eat ice cream. Therefore, ice cream causes drowning."