Depends on the clients. I remember a case where a family that hid their daughter's cosmetic surgeries had the marriage annulled when it was discovered by the groom's much wealthier family.
So a lucrative target might be someone who traveled from outside the US to have work done to hide it, especially if they were relatively young.
It’s always possible to come up with an extremely unlikely scenario where the data would he be extraordinarily valuable, but nobody is going to bet hundreds of thousands (or millions, to actually make it worth it for the ransomware gang) to buy the data.
So a lucrative target might be someone who traveled from outside the US to have work done to hide it, especially if they were relatively young.