Of course it's entertainment, but it can still jack with your emotions. You shouldn't let it rule how you live your life, of course, but you go fishing with your buds and the fish aren't biting. Sure, at the end of the day you got to hang with your peeps and drink a few pops, but it still sucks not to have some fish in the cooler. No different with football. You watch the game, hang with your peeps, drink a few pops, and all of that is great, then the team stinks the joint up.
Whatever entertainment it is you choose to entertain you, it still requires your valuable time. You go to a highly anticipated movie and it turns out the plot is full of holes, the acting was bad, then you feel your valuable time is wasted.
Yeah, it's just entertainment, and doesn't mean much in the big picture, but it's still impactful to you because it's your time.