I think I agree with you. You probably should not have exposed your children to technology that you didn't understand.
I didn't allow my children to have access to porn until I thought they were old enough to appreciate it, at which point I installed a computer with high speed internet access in their room and allowed them to close their door when they wanted privacy.
I, who was denied access to porn until much later in life, was no where near as healthy in attitude or practice at that age as they are now.
I suspect porn is less unhealthy for a child than controlling, repressed parents who think of nudity and sex as dirty.
Guns don't kill people and computers do not expose children to anything, but those who own guns and computers are responsible for what is done with them.