The better analogy would be that Fedex, since they need to transport things from city to city, could choose to buy jets to transport with instead of renting them or contracting a company to fly for them, which they already do. To remove datacenters is more like removing the jets.
You don’t buy a jet outright and forget about the supplier - you’re eternally reliant on their service, certification, parts, etc, as regulation is so high.
Yes but you are comparing to having a datacenter vs removing the datacenter completely. In this example FedEx has removed the datacenter completely, instead relying on someone else’s servers. So the correct comparison is to remove the jets and let someone else fly for you.
Edit: removed rude phrasing.