Well I don't think the problem is about wether it's seller or customer friendly but how the cost is distributed between the customers. If the warranty is high,

Well I don't think the problem is about wether it's seller or customer friendly but how the cost is distributed between the customers. If the warranty is high, the additional support costs will added to the product price, such that the support penalty is effectively shared between the customers. On the other side, if the warranty period is short, the product price will be lower, but a small number of customers must pay a lot to repair their devices out of warranty. Then one needs to take into consideration that there are many ways to break a device by being "sloppy" but not fall outside warranty constrains. I try to be careful with the devices I own and in the first case I would have to pay for the carelessness of other people and I don't like that. On the other side high repair cost can be a large burden to single individuals, which is when it is reasonable to share risks in the community (see, e.g., medical costs).  This is why I guess the European law is basically about getting a working device in the first place and not about how repair costs are being distributed, which is non-obvious to decide.