It reads as though that's somehow where it came from or is an authoritative source required to use or interpret it. In this case, the phrase vaguely associates toxicity with masculinity, and whether it's intended or not, if a more specific nuanced meaning is intended, then it should be articulated concisely with a different choice of language that probably should have been chosen in the first place; the intuitive interpretation is the one that takes hold.

In different contexts in real life, I've had people be outwardly racist, sexist, or otherwise prejudiced toward me, and when responded to in a very calm manner, they scoffed that "oh here's a book to read on why actually that's impossible" when actually nah we're all just using language, and if there's a progressive, genuine intention to create a space that's as equitable and as conflict-free as possible for all, than shit like that isn't going to fly.