1. "Because tariffs can involve the percentage of a product that is made in the USA vs foreign made."
We all know this. So why are you talking about *consumer choice* in relation to tariff policy?
2. Because time is easily quantifiable. It's embedded in exists product and accounting info. Also, it's just one example of a practical calculation for a movie. Where parts may be a more practical calculation for an auto.
I asked why time was a *more important* metric than value-add. You've responded by saying it's easier to measure. The two things, importance and ease-of-measurement, are completely orthogonal.
3. In auto metrics they chose to ignore design, offering only parts manufacture and assembly. They certainly could do that in film too, or not. It's up to whoever determines and designs the metrics to be published. As an artistic effort, time would seem more important physical nuts and bolts so if writing and other pre-production efforts are reasonable possibilities for metrics.
The "they" in your first sentence appears to refer to auto OEMs. But we are talking about tariffs, which is about what the *government* chooses to measure.
4. Except for the part about the percentage of a product being USA made factoring into a tariff computation.
A movie is a *service* in terms of trade, not a product. Treating it as though it were a product is the root of the policy stupidity and your misconceived comparisons.