aries – a prominent rosh yeshiva said that it is a good idea to let kids watch kosher videos as opposed to disallowing all forms of TV viewing altogether because if they don’t experience TV viewing at all, there will be a very strong desire to do so, and it won’t manifest towards kosher stuff, nor is it guaranteed that they will find a kosher way to do so even if they wanted to, because people have a strong desire to do things they don’t often get to do or thngs they haven’t done to “taste” it. There is an inyan to “feed” the yetzer hara a little because that diminishes the desire of whatever the yetzer hara is pushing for.
So by the internet, sometimes it’s better that people have a kosher way to use the internet than ultimately use it in a non-kosher way. This in no way is saying that people should use the internet, just that for some people, not using it at all will build a super strong desire to do so, which is unhealthy etc.