You're right that intrinsic isn't really the right word, but the problem with pre-marginalist theories of value isn't that they're intrinsic per-se, it's that they're objective.
It's exactly that products do not have prices that is the problem. The apparent 'price' of a product is an epiphenomenon of a particular market, a side effect of the unequal subjective values of the participants (and it's trivial to observe that these clearing prices are determined at the margin, not on average, which makes aggregate LTV even wronger than the regular kind)
In a well-functioning market all products have clearing prices that are easily measured and compared to one another, but this is a mirage that requires constant arbitrage to maintain. The slightest change in unrelated market conditions turns dirt into ore or crude oil into toxic waste, with no objective change in the material itself, only changes in the subjective needs of the participants.