Your argument can be extended infinitely. It's pretty easy to understand that Tesla (and any other assembly plants that fit in this window) is simply getting special treatment here.
The factory that makes hydraulic fluid for Tesla's presses that stamp out car parts is also part of the transportation supply chain, As is the oil refinery that supplies feedstock to the hydraulic oil vendor.
The factory that makes hydraulic fluid for Tesla's presses that stamp out car parts is also part of the transportation supply chain, As is the oil refinery that supplies feedstock to the hydraulic oil vendor.