Given that we've largely decided that sustainability is the way forward, an argument in favour of e-waste isn't particularly convincing.
User-replaceable batteries are just the first step. What we should all be pushing towards to reduce waste and emissions is a no-compromise right to repair, with easily accessible parts, tools and schematics.
I support the right to repair, but it's not the only way to reduce e-waste. Another complementary approach is through refundable deposits, just like with beverage containers. Include a $20+ deposit in the price of each smartphone, then refund it when the consumer returns it to a retailer or manufacturer for proper recycling and safe disposal.
User-replaceable batteries are just the first step. What we should all be pushing towards to reduce waste and emissions is a no-compromise right to repair, with easily accessible parts, tools and schematics.