[D] Where does the real value of a data scientist come from?

Companies care about what you can do for them with high regard to profit. A typical software engineer's value in my opinion is that:

1. They can deliver code fast

2. They're smart enough

i.e. they are extremely expendable, which is something you never want to be. Are data scientists as expendable as software engineers? What makes a data scientist irreplaceable and desired in the marketplace?

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