Because it's a regulated industry. I don't watch porn from Turkmenistan filmed on a dodgy handheld in the back of a 1974 van.

I'm not saying that there isn't anyone one in the porn industry who is a sex slave, but it seems a bit of a stretch to assume that most people are, and banning porn from computers in the UK, will have a positive impact on human trafficking around the world. It won't.

There are probably people working in fruit farms/restaurants in the UK that have been trafficked. It happens everywhere and in every industry, but porn is actually fairly decent for looking after the people involved these days.