At some point the f150 may be only electric? So maybe advertising isn't so important if people just want the model regardless of the engine.
This article shows us how many new customers Ford is attracting: https://www.motor1.com/news/552814/ford-lighting-customer-ne...
It's designed to get the guy who has a Tesla and a Tacoma in his driveway and who sees fullsize domestic trucks as a penis extension for backwards hicks to trade both those in.
This isn't about converting existing owners. It's about growing the potential market.