[Mithalwen]

But that surely refers to specific exceptional individuals is already identified: Luthien, Feanor, Celebrimbor, Galadriel, maybe others. It is a huge step to extrapolate that because these exceptional elves were able to make one off remarkable things such as the Silmarilli, Palantiri, the Elessars, -which could not be repeated in some cases even by themselves,that mortals would be unable to learn the humbler crafts of elves. Which was the actual question.

We know that dwarves in general can rival the Noldor in smithying and stonework, the Numenoreans crafted blades that could worst the Witch King but you are saying that a hobbit would be unable to make silvan rope because he couldn't make a Silmaril. Even though the silvan elf on the ground seems to think it possible. He doesn't say " our ropemakers serve a thousand year apprenticeship to learn the secrets so you just wouldn't live long enough" , it is only because he us literally leaving that minute that is the problem.

Sculpture may well have reached its peak in renaissance Florence but while only Michelangelo couldcraft David, any competent modern mason can dress a stone well enough for practical purposes.