Armored Backpack

I ordered the Lenovo backpack for my new computer because the more expensive Amazon Basics backpack for 17" laptops would not fit--and the Lenovo was slightly cheaper.  They described it as "armored": should I get my greaves out to match?  No, I knew better.  While I would not wear this to San Francisco (or even visit it) the back is pretty tough plastic, enough to stop a box cutter and perhaps even a knife plunged with medium force.  The laptop is pretty tough also, and would likely absorb anything that went through the hard plastic.