Is squeezing most sales per advertising campaign or saving a few pennies per unit delivered of a mass market product really worth what the economy is willing to pay for that? Does it really make sense to make that kind of optimization scale to the point that absolutely necessary work fails to have meaningful value?
It is really hard to measure bullshit jobs specifically, but it might be more easy and meaningful to try to characterize this strange gradient where abstracted work that is distant from people has value far beyond the simple and necessary basics of human social function. Worry less about the bullshit label and try coming up with a measure more like dollars lost per human life improved.