I don't believe people will think Apple is making duds. The sound quality on the fakes will be a dead giveaway for most. They'll google their particular quality issues and find dozens of YouTube videos on how to spot a fake, and figure it out. They're also going to half expect it if they purchase from someone they don't know. Valid Serial Numbers could be shared between resellers or people who refurbish them. From what I've read, it's not hard to get the software to work with iOs. It's been going on forever and it doesn't appear that Apple is throwing any resources into fixing it. (They were too busy figuring out how to upgrade AirPods Max.)