"I'm so worried I can't have children, I think I'll go watch a movie or do something online instead" is so obviously wrong on cause and effect.
People get hooked on this stuff before they even have biological urges to reproduce.
And it supplants the urge to reproduce.
Tech and entertainment are birth control.
I was thinking more along the lines of "I'm not in a position to have children because I can't afford them, so I won't. Now I have more time to fill, what's on TV?"
How can you tell that isn't what's happened from looking at the rise of tech?