To an extent I agree with you. The “problem” comes when people slowly start to realize that and open them or throw them out. At which point the items actually can become worth something. Though again, unlikely.

Part of the problem with most collectibles “meant” to be “worth something eventually”, are packaged in such a way that they are “enjoyable” in the packaging. You can put a sealed Funko or Beanie Baby on a shelf and you’re looking at the item itself. There’s no reason to open them.

If you truly want a “collectible”, purchase something like a game console and keep it in its box for fifty years.