I am going to err on the side of positivity and say that it isn't so rare. At least, not anymore and when it comes to LGBTQ+. All parents fuck up because nobody knows what the fuck they are doing, but the key is to mot let your hang-ups injure your child. I think a lot of parents have been taking on that challenge for some time now.
My dad told me he'd love me always before I came out and hasn't spoken to me since, I wish for others to have a better experience than me cause this shit's brutal