Forever the cynic, I say lead bullet bans are primarily just another attempt to obstruct hunting through never-ending hyper regulations.

Accepting eagles and certain birds are extremely vulnerable to lead poisoning doesnt mean a blanket lead ban is warranted. Nobody wants birds to die or to poison their friends and families. Determining best practices for field dressing and butchering would probably solve most of the problems. Maybe limited bans are warranted in specific locations at specific times. Let the State wildlife agencies manage it like everything else. Your antagonists at the Federal level will ban lead in areas that dont even hold bald eagles or condors.