Sin is pleasurable for a season.
The demand will forever remain because pedophiles enjoy their sin.
There will always be demand, because even if existing sinners repent or are removed there will always be new people who become the same kind of sinners.
There is nothing new under the sun.
The best way to reduce demand is with millstones, and the depths of the sea. A penalty harsh, final, and to be feared.
Fearing hell helps, too. Not many believe it is for real. Same as they don’t believe in the wrath of God. People don’t believe God rules the nations. Maybe because they vote now and make the rules.
“even if existing sinners repent”
that does sound kind of lackadaisical... where are you in gospel mission mindedness?