You're a the most qualified person on the internet for cisgender, trans, and intersex word policing.
Now that I know and if I don't change, you'll make sure to report it to the cisgender police for trans activities special victims unit...
It's interesting you chose the statement "it's not difficult to be better, it's just a choice". You could have started this entire interaction with "hey dude, just a heads up that a lot of transphobes use phrases like 'biological male' to invalidate trans identities", but instead you took the opportunity to speak down to me and made sure I was now "educated" and that I can stop using wrong speak.
Thank God you're here as an ally to make people question why those of us on this side of the fence can't even get along internally.