Intellectuals also don't outright tell you that Extra Terrestrials are fictional, instead they try to discover if they're or not. As you might know, the question is still open as we have no definitive answers there.
Anyway to not turn this to debate I'm just going to point out that besides I use internet a lot and watch a lot entertainment I'm not ignorant when it comes to trying learn new things or practice what I have already learned. As far I know entertainment is not turning my mind to "mush" and nor it's making me "slower.