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"As an engineer, it doesn't make any difference what you do," he joked last week.

..reminds me of Tom Lehrer's take on Wernher von Braun [1]

The context of that sentence is that it makes no difference whether you work on cargo ships or rockets.

Some rockets are cargo ships, some are not.

Once rockets go up, who cares where they come down. It's not my department, says Wernher von Braun