I personally think that pedophilia is genetic, or a chemical brain imbalance or something.

Any evidence of that, or just playing armchair scientist?

It seems a lot more likely that humans don't have control over their attractions in general. Human sexuality has never been linked to specific genetics or brain chemistry, so maybe put the calipers away.

You don't choose to be straight, you don't choose to be gay. You don't choose to like big boobs or little boobs. You don't choose whether or not to be attracted to muscles. You literally don't get to choose "your type". You have your own set of attractions that you largely discover about yourself, rather than decide for yourself.

Pedophilia is likely no different. The only difference in practice is that most other types of interpersonal attraction can be ethically fulfilled between consenting adults. Pedophilia, by definition, cannot, as it involves someone who cannot ethically consent.

We need to start looking at people with inappropriate attractions as people who carry a burden.