The belief that guys are "expendable". Where do men get this nonsense from?

I was answering another question on GAG, when I came across this claim; "Society doesn’t care about us (i. e. men). We are expendable".

It's not the first time I've come across this particular claim either. Where are they getting these weird ideas from? The online "manosphere"? That klutz Andrew Tate? Piers Morgan? Jordan Peterson?

The belief that guys are "expendable". Where do men get this nonsense from?
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