My mean coworker told me I should know how to protect myself cuz no one will protect me at work?

I had a problem where I was blamed for things I didn't do at work and my terror coworker I called her that because she always seem angry when people write it wrong on forms and then I had a problem and she knew it she gave me advice how to protect myself cuz no ones gonna defend me but myself. How true is that?
My mean coworker told me I should know how to protect myself cuz no one will protect me at work?
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