Command Line Pipeline Question

Hello,

Okay, so I’m not entirely sure what it means that the standard input pipes out to the standard output of another command. Also, the command is cat whatever.txt | wc
So how come I cannot just do wc whatever.txt instead of that other command? It displays the same information. I didn’t see the purpose of having to use cat whatever.txt | wc
Please help me I’m not entirely sure what the Pipelines mean.
Thank you.

Blessings,
Moses

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