If you add all the pics I ever took, all the pics my parents ever took, all the pics my grandparents ever took, I doubt we'd be even close to 40,000 pictures.
Much less of one subject.
Their kids people. Let them be free. Let some things fade to memory
The generations before you were limited by film, the cost of developing, and finding a place to store the physical pics.
Our new camera can take 5 shots in 3 seconds, and with how cheap hard drives are, we can store every single one if we wanted.
I think you just don't have any kind of reference to how some people feel about their kids, especially when there's been some difficulty involved. It took us over 2 years of trying before we concieved our son, and that's nothing compared to the level of hardship some people go through just to have their own children. When you put that much effort in, and despite the obvious jokes, it's not really all fun, you've already got an emotional investment in the child that for many manifests in a desire to record every single moment.
There's nothing our picture record has taken away from our kids. And even at just almost 3 years old, I'm totally thankful we have so many pics of him as a baby, because I really don't have many first-hand memories of him that way. When you see them grow every day, I don't think your mind stores images of them from the past the same way.