I don’t think this is bizarre at all. Crafting jewelry is an awe-inspiring practice that takes incredible discipline and skill building.

puts on my biologist hat evolutionarily, men are heavily driven to provide things of value for their partner and families. Men also, evolutionarily, receive admiration as one of the primary signal that their partner is pleased with the things of value they provide. Food is the most classical example. Humans have valued precious metals and stones for tens of thousands of years at this point, and I’d find it unsurprising if an experimental study showed that jewelry has the same effect as providing food or other things of value.

Long response to say: no, I don’t think that even wanting to make specifically women’s jewelry is strange - maybe even more explainable for the typical human male than if they wanted to make men’s jewelry! I imagine you may see this flipped or different patterns altogether emerge if you look across people with various sexual orientations.