Now, at what age do you think that a child is capable of giving consent to undergo hormone therapy and gender altering treatments or operations in general? Is 8 good? I think there has been some, you know, discussion about this as well.
All of these "taboo" matters have to be discussed at some point. Scientists discuss them and society discusses them every now and then, and they will be rediscussed sometime in the future, maybe in 10 years, maybe in 50, maybe in 200. It is kind of natural to discuss things.
Also, you are twisting the facts by trying to present a discussion about a certain topic as a call to engage in sexual activity.
And you guessed "they're downvoting me because they're pedophiles?"
Maybe people aren't responding to you because they feel that from your initial frame on the topic and your decision to frame opponents on it as bad people, no fruitful discussion with you can be had.