Go to the London tower and look at the crown jewels. It's jaw dropping.
It's of course a way of displaying your wealth, but it also reflects and scatters light in an incredible way.
fair enough if part of the bling is being dazzled by the price or prestige, but optically moissanite has a more brilliant refractive index than diamond
The "bling value" does exist. But a diamond jewelry is mostly to signal status. If the signal is cheap, the value is worthless.
Just buy your wife an engagement ring and tell her it's a cheap, second hand, artificial diamond and watch the light die out of her eyes.