Visual artists work that gains value is highly correlated with their network to begin with.
Right school, right galleries, never ever being seen in a lesser gallery. It makes me sad when an artist who wants to monetize is celebrating the mere fact of being on display as validation, when that very act is undermining the value of their work forever. Is the alternative of being in a prestigious gallery achievable for them? Probably not, and they should consider resigning to that reality if their time is valuable.
I think this is not known because when I listen to many talented and aspiring artists the things they value are so at odds with the things that would make them valuable. Things like "I never had formal education" being a bragging point to an aspiring artist not being aware thats not a bragging point to the people that the artist wants to assign value to their work.