The standard should be higher for machines. Historically, they're inorganic tools.
If a hammer was only as dense as bone, would it be a good hammer?
If a hammer was only as dense as bone, would it be a good hammer?
Yes, it is possible that such a hammer would still be very useful, if that was the only available option.
Imperfect hammers can still be very very useful, when compared to having no hammers.