A lot of people make this point but I just don't think the analogy works. For one, you use the headphones with the phone as well as other devices, and those things might not grow a Lightning port.
Exactly. Are airplanes manufacturers going to start building in the lightning port?
You joke but this has already been suggested by several airplane manufacturers. They want to build in lightning and USB-C ports to replace/add to the power outlets. Most airports already have the extra USB ports now next to the power block.