Not that I think they should be included in LGBTQ+ but as someone who is bisexual I feel they're not as far from us as you seemingly believe. Why wouldn't we compare them? Both are sexual attractions that deviate from the norm. A pedophile didn't choose to be a pedophile anymore than I chose to be bi.
Growing up in a conservative household and town was a miserable experience for me. I hated myself, didn't want to accept it, and felt utterly alone. Now think about how much worse it must be to realize you're attracted to children. You have zero allies, you have zero people you can talk to, and a lot of people hate you merely for existing and/or want you dead. From where I stand their experience echoes my experience being LBGTQ+ quite heavily. Except over my lifetime LBGTQ+ acceptance grew quite rapidly and my husband was the light at the end of the tunnel. But pedophiles will never get that, probably ever. I feel nothing but sympathy for their situation.
And what "serious psychiatric care" do you even think there is for it? Unless you also believe in gay conversion camps, we have nothing. We don't even really know how sexuality actually works in the brain, we definitely aren't anywhere close to being able to treat it.
This is like telling someone to "stop liking rock music" or "stop enjoying ice cream." People don't decide what their preferences are, they just have them. If we can give pedophiles a way to release those urges without harming children that should be a good thing. Well not good, but positive in the relative sense at least.
That is not required. Especially in the larger models like a DALLE-3 it can combine concepts even without being directly trained on it. The one they had in the showcase for DALLE-2 was a chair shaped like an avocado. It knows what a chair is and it knows what an avocado is, so it can combine them. So it can know "this is what a naked human looks like" and "this is what a human child looks like" and could combine them without having ever seen CSAM.