> If you stood on the street corner and asked every passerby what they would change about their phone, I think you would be there all day before someone said "I wish I could replace the battery".

If you stood on the street corner and asked every passerby if they want their phone to have a replaceable battery, I don't think you would be there very long before receiving a "yes". I think that's a more honest framing of the question.

> I suppose someone will say that this law is necessary for environmental reasons, regardless of people's preferences. But that's nonsense, because the law doesn't actually require people to replace batteries rather than replacing their phone

How could they replace their batteries if they wanted to, unless the manufacturer makes it possible? The goal is not to force individuals to not replace their phones, but rather to provide that as an option at all, for those who want it.

> At the very least we'd need to see some data that shows that most people replace batteries when it is possible to do so.

At the very least, we'd need only data showing that that number is non-zero. From where did you get the idea that we need to prove "most" people would choose to take advantage of this option?

> The goal is not to force individuals to not replace their phones, but rather to provide that as an option at all, for those who want it.

But my point is that you need to recognize that in so doing, you are taking away the option of having other things, such as waterproofing, larger batteries, smaller/lighter phones, etc. There is no free lunch.