

As opposed to a fantasy, yes.
Ah yes. Nothing is possible, we should accept the scraps that our rulers and industry leaders allow us and be grateful. “The orphan crushing machine is quite tolerable today, thank ye sire for only taking three children”.
If Biden truly wanted to, he could have curbed Israel in 2023. And not even anything as bold as an immediate and complete arms embargo; there was a lot of US soft power that he and Harris refused to wield, and what was done was largely token optics like sanctioning settlers whilst shipping arms contrary to US regulations, or ‘pausing’ delivery of 2,000lb bombs whilst keeping the 500lb & 1,000lb bombs and artillery shells flowing.
It’s still a losing proposition, even if you don’t already have a factory in [insert country]. Steel is cheap yes, the value add comes from labor and capex payback yes, but there’s more than just metal that makes a car go vroom .
Ca parts could be anything from plastic fan ducting or the infotainment screen, or major components like engines and drivetrains. The majority of which is plastics/polymers and aluminum. The engine has steel sure, but the aluminum block is the most expensive part, while steel con-rods, crankshafts, and gears aren’t exactly an easy thing to set up a new factory in order to duck tariffs - tariffs that have been proven to come and go over social media beef.
So while it’s impossible to truly know the full BoM cost without seeing each component category’s HTS codes and how each maker sources their parts, I’d still wager that the 15% is the better pathway. Especially if you already have a factory, a known and trained labor pool, established transit and vendor links, etc
What it’ll definitely have more impact upon is expensive or luxury brands, because the material cost doesn’t scale with the sticker price the consumer sees.