To be fair, the charging cases (if we talk about earbuds) are a good idea.
That said, with wired headphones I need to charge one device less, don’t have to worry about battery care (no matter how much effort you consider this, it’s zero with wired) and it’s no factor for the longevity of the device.
Also this:
And if you’re going on long road trips, just pack an adapter and wired headphones if you’re that conscious.
So I need another pair of headphones and an apdapter vs just one pair of headphones?