I would favor freedom over one size fits all "that is good, that is bad". 40 years ago you had no option to make and keep that many pictures.
Even if I would agree with you that people keep too many digital pictures, if someone wants to do it I would also defend their right, because I do not think it is that negative that is worth fighting against.
PS: to put it to the extreme shouldn't we spend any time on hacker news "but spent more time with their families, sharing stories and souvenirs."?...
Companies have taught us to do otherwise for their profit, don’t forget to back up that.