I understand why it would but .... some games are starting to push the 8GB boundary, and it's a tradition in PC haardware to push hardware limits. So if, you me, you want to preserve the longevity of what is, after all, not exactly a cheap component, i does become a factor to consider and, providing the difference in price isn't too silly, certainly better to have more than less, other factos being equal.
Of course, if getting extra memory means going for next gen, waiting who knows how long, putting up with large extra power draw and maybe heat, well, that's a LOT more questionable.
For me, I'm prepared to go to a pretty healthy price, but only up to a point, and if I do, I want to get the best blend of hardware for my needs (which is not just gaming, BTW) that I can. That means the extra memory is appealing, providig the price premium to do it isn't too much, for me. It's all relative.
For anybody else, mileage may vary.