It's much easier to ship it via air. If this is for some assembly line you'd have weekly shipments by container vessel. Instead of putting it into a container vessel to arrive 4+ weeks later, just air it and have it in a 1-2 days at most.
This was about a factory line possibly shutting down. In those cases it'll be shipped via air.
To be clear: I work in this industry. In case of an (factory) assembly line shutting down they'll resort to airfreight. I noticed people downvoting my reply, while it is entirely factual.