Per DuckDuckGo, the 2nd definition of “pusillanimous” in the American Heritage Dictionary is:
> Destitute of a manly or courageous strength and firmness of mind; of weak spirit; mean-spirited; spiritless; cowardly; -- said of persons,
“Destitute of a manly spirit” implies that there is such a thing as a manly spirit one can be more or less possessed of… that falls well and truly under the scope of the meaning of toxic masculinity.
And perhaps you, for some reason, think that women aren’t perfectly able to engage in toxic masculinity?
Either way, I only use the term where and when appropriate.