@Meruem whilst I don't disagree with your comments which I assume come from professional experience, I think that's been the case since the internet and the dark web. However, a lot of people who have commented here about their personal experiences which would have happened before that. Myself included, back in the 80's.
With that personal experience and going through safeguarding training with the NSPCC whereby we had to watch interviews with convicted paedophiles it's clear that they are masters at grooming not just the child, but everyone around that child.
They pull the wool over everyone's eyes inc their own work colleagues to place them above suspicion. This only makes it harder for any child to speak up because it limits access to anyone who may be able to help and they become even more isolated and feel helpless.
The fact that this man had no thought for these poor children. Was he just dehumanising them and unable to relate his actions for example to his own grandchild and the impact on them if they were victim to some other predator...
I would question whether a porn addiction had escalated to include children through sheer boredom, or was he just a very smart man who also happens to be a paedophile and it was having this time on his hands and access to the internet that meant he could cater to innate desires. I'd have to say the latter.