The recreation use from them is not worth the inevitable shootings. As the safety of the many come before the pleasure of the few. Not to mention the lead exposure on the environment from the bullet casings left on the ground and all the noise that’s caused from all the firing disrupting the wildlife.
If you want to play with guns like toys go take a vacation down south.
The only people who should have access to guns are the military, special forces and hunters in remote areas without any food alternatives.
Drop the argument about casings. It weakens other, rational, arguments. The amount of lead in casings is minimal, and making that out to be some big issue makes you seem like a fool grasping at straws to prove their point. It’s like saying cars are bad because touching hot engines causes burns. Ok, technically true; but there are so many bigger issues you could focus on that trying to hang your hat on that one feels like you’re just pulling the reasons they’re bad out of your ass and you haven’t done any actual research beyond what you feel is right.