Why would they go through all that when it's super trivial & simple to just take a battery back and bolt it under the truck bed? An engineering team with a Ford

Why would they go through all that when it's super trivial & simple to just take a battery back and bolt it under the truck bed? An engineering team with a Ford marketing budget & a week of time could trivially do an EV conversion of an existing F150. People do EV conversions as a hobby in their garages at home, why would you immediately jump to such a conspiracy for something so simple? And the video of the stunt also has a bunch of angles, including an overhead shot, and there's no hint of anything like a power cord and the truck bed is visibly empty?