This is how I feel as well. I can't PROVE that it does something magical for me, but it's easy enough to save my bones in a freezer bag and, whenever it's full (could be 2 weeks or 2 months, depending on how often I cook short ribs, drumsticks, or wings) I will make something from it. I can buy the plausibility that it's beneficial, but it is the sort of "beneficial" that won't just show up in a single workout or a single day.
^Basically this is what I do as well. Add enough water to cover the pile of bones, add a little ACV, and let it go for a full day.