I want to be clear that this isn't a "transmasc vs transfem" thing. I've seen this parroted by all variety of queer people, and it's nearly identical to common TERF rhetoric. The idea that T = violent is a deeply instilled cultural myth that is unproductive and harms trans people across the board.
I'm sick of seeing other queer people cling to the idea that "testosterone makes you more angry and violent." It's bioessentialist bullshit that we need to unlearn if we want to deconstruct transphobia and sexism. And I delayed my transition for nearly a decade because of it.