It does provide a benefit to you. You get to use the Find My network to help locate any missing devices you have and in exchange your devices also work as a node in the Find My network to help other people locate their devices. You can disable this by disabling Find My.
But that's the point OP is trying to make. It's an opt-out feature, and only once you know it's an issue and continuously making sure you're never opted back in.
The US is opt-in and has an organ donor rate of about 60%.
More than half of adults in the US choose to opt-in, and I believe that if there were better education and marketing campaigns for organ donation, more people would sign up, too.
Nothing stops Apple from doing the same education and marketing for an opt-in system.
