With completely wireless earbuds, the rule is: when the battery fails, they have to be disposed of. Not so with the Fairbuds, that allow you to replace batteries in just a few seconds. Combined with a repairable design, the earbuds should therefore have an extremely long lifetime.
The workers literally get paid bonuses for each phone that gets made. The phone’s parts all get certified for sustainability. They need to find manufacturers willing to fulfill their requirements, for which they will obviously charge more.
I’m not saying that they’re for everyone or should be free from criticism. I personally decided against buying one due to the size, performance and camera. But if you’re complaining about a sustainable product costing more than a regular one, you’re missing the point and were never in the target audience in the first place.