He loads a package vs. he is loading a package?

[Torsten]

In the "Essential Review for the TOEIC" by Kaplan on page 37 you will see a photo showing a man who loading a package into a truck. It relates to a TOEIC question and the correct answer is "He loads the package onto a truck".

Now, why does the speaker use the simple present here? I would have thought that it's more appropriate to say "He is loading a package onto the truck."

What do you think?
Many thanks,
Torsten
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Test Of English for International Communication
TOEIC Preparation & TOEIC Vocabulary