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.
People will deny this but this is the only real reason for doing that. The other reason is copying apple, which isn’t really another reason as apple removed it for the first reason. Fairphone just went the extra mile to claim that headphones are wasteful, in essence they’re making an excuse to cover up their reason why and also trying to force others to do it as well.