I'm low-contact with my parents on purpose and they don't know that we're LC

I (35f) am low-contact with my parents (65m & 59f) and they think I'm just busy. I never told them I was going low contact. I'm not going to tell them either. They hated my ex (37f) because she was also female and my parents were preachers.

Mom has come around a little bit and is a touch more open minded. But my dad (who's in the hospital with some unknown kidney drama) just tried to argue with me over the phone about trans people being whatever sex they were born as regardless of surgery. I just called to touch base and let him know that I knew he was sick and was thinking about him. And he said something about if she wants to cut off a pair of perfectly good D's (???!!!???), more power to her.

I'm not going to argue with a dehydrated boomer, dad or no, so I changed the subject but that kind of crap is why I don't call.

He deadnames me, too, even though he doesn't use his legal name either. I haven't been face to face with him since my sister's wedding 2012.

I don't hate him. I can't. But I don't have to call him either.