Manslayer in a sentence as a noun

It was chosen to be a gendered word, a tongue in cheek attack on the prevalence of accidentally gendered words like mankind and manslayer. When we are moving away from words that use the root word man to avoid accidental gendering, why would a new word be created that is gendered if it is not an attack on that gender?

Manslayer definitions

noun

a criminal who commits homicide (who performs the unlawful premeditated killing of another human being)

See also: murderer liquidator