Earlier quoted context omitted.
This is a cultural thing you've bought into, that a man must give a woman a tool to signal with. In other cultures this is not important or works the other way around. I'm anti diamond and your pleas to come up with another useless signal fall on deaf ears - this manufactured need for the signal itself is something we should be fighting as we progress. For a start it's pretty damned sexist and regressive
Why do you assume I've "bought into" it? I have no intention to marry any time soon, I just think it's unhelpful to completely ignore the reason diamonds are used for engagement rings.
I think the 'reason' is a rationalisation and not hard and fast, it's also culture-specific so hardly transcendent. That's why I take issue with the idea of replacing one signal with the other - the worth of tge signal is entirely subjective and the signal itself is rather out of place in the modern world.