This will fund the human passenger global infrastructure and provide massive profits while performing millions of test flights to prove human passenger safety.
Ultra-rapid delivery of packages is clearly the precursor to point-to-point human travel. It will support massive volume increases, cost reductions and safety testing.
This is just like mass consumer electric cars and trucks being the precursor platform for self-driving robotaxis.
Projected SpaceX Starship capabilities are all at the level that Elon Musk describes as target in his Air Force pitch day interview.
Fedex makes about $40 billion a year from Express delivery which is mainly next-day delivery. DHL also makes nearly $20 billion per year from the express delivery. The express delivery market is continuing to grow.