I didn't think they're underestimating anything, I think they're pointing out that an absolute like this would be pretty devastating. Like if we applied this to medical equipment, it would be pretty terrible. And even if you made an exception for something like medical equipment, that's a regulated category of goods, and would still massively reduce the amount of waste produced, even if people used loopholes created by that exception.
I didn't think they're underestimating anything, I think they're pointing out that an absolute like this would be pretty devastating. Like if we applied this to medical equipment, it would be pretty terrible. And even if you made an exception for something like medical equipment, that's a regulated category of goods, and would still massively reduce the amount of waste produced, even if people used loopholes created by that exception.