Driving used to be the primary way you facilitated face to face interaction which was the primary way you facilitated sex.
It’s not like anything significant has happened transportation-wise to replace driving. If kids don’t want to drive it means they care a lot less about meeting up with other kids.
The point is those face to face interactions don’t seem to be happening the way they used to.
Sex isn’t going to happen if people don’t interact with each other. It’s all symptoms of the same “disease” (which seems to be or be strongly associated to anxiety).