All people need practice throwing balls

So we finally get a break in the rain and mum, our neighbour and my mates all head down to the local park (good work mum). Mum didn’t bring ball (figured I should be running around playing with other dogs… Not so good work mum) but never mind as I find a ball. All good as mum throws it for me a few times but I am a big believer in helping all people learn to develop their ball throwing skills and hence share the fun around. I get the ball and go up to other people in the park and drop it at their feet so the can practice. What I don’t get is the people who ignore the ball and walk straight past it??? Don’t they realize what an important skill ball throwing is for a human and how I am helping them train???