I think that what happens is that people have internet because they need it for work, etc, and once they have it, they end up using it to watch tv. It’s the same way that if they happened to be somewhere where there was a tv, they might end up watching it, but since they make sure not to have a tv in their homes in the first place (since it’s not needed), it doesn’t come up. And even if they go somewhere where there is a tv, it might not be an issue since it is ingrained in them that a television is something that is completely assur and that they never touch.
That’s probably also one of the reasons why people sometimes find it hard not to speak loshon hora, even though they don’t find it hard not to do aveiros. Since you use your mouth all the time to talk, it’s hard to always be careful not to speak l’h. On the other hand, when it comes to most other aveiros, you can usually avoid having the assur object around, and it’s ingrained in you that that item is assur and you don’t go near it.
When it comes to something that is used on a regular basis for a muttar purpose, it is harder to not use it for assur purposes.