I guess we like movies because they give us a chance to imagine and escape, and visualise an alternate landscape to the one we live in currently. Like, sure, you also get this with books, but with movies, you get that image shown to you straight up, which I guess is nice if you struggle creating landscapes in your mind purely from words in a book, or don't have the energy to.
They're a display of creativity and art - fundamentally, they're a form of expression.
There are some really, really good movies. But good lord, there are some incredibly shit movies. Really, really, really shit movies.
I've found as I get older that I don't enjoy them as much, and that I'm a lot more picky. I struggle to sit down and watch a movie and focus purely on it - but that probably says more about my mental state and restlessness than anything else haha. I don't tend to watch them as often now because I always need to be doing something with my hands - so I always end up playing a game on my phone or something while watching, and that seems to annoy people. That being said, there's still plenty of movies that I enjoy watching.
There's also something nice about curling up under a blanket with a cup of tea and watching a movie when you're feeling sick.