When it comes to old Fenders, that is simply another guitar myth. In the 60's millions of kids bought electric guitars and basses. Most never took up playing seriously, resulting in vast numbers of guitars stored in closets or under beds for decades for that reason, not because those guitars were somehow defective. The idea that the "good ones" got played heavily, while the "duds" sat under a bed is just fuzzy thinking that gets repeated like an echo until folks eventually accept it as fact. As if an "explanation" is needed for why so many guitars weren't played very much at all, when the sheer number of sales over those years is the explanation. The same thing is happening today, millions of guitar sales. Forty years from now will folks be trying to figure out why there are bazillions of minty guitars left over from back then?