Yeah, if you don't like a genre because you don't enjoy the movies, nothing anyone can do about that. Tastes, opinions, etc. That seems to be Elfboy's point stating that nothing wrong with "mindless entertainment", but if you fail at that, the movie has absolutely nothing going for it outside of maybe some visuals or something (which in most cases isn't enough to carry a movie.) A thoughtful but boring movie will at least have you think about it after the fact, so there's that, though don't expect me to call it a "good movie" because if it's not delivered in an entertaining way, then you wasted my time on something I probably could have mulled over reading a well written article on the same thing. Matrix comes to mind for a movie that was entertaining and had some thought provoking aspects; not saying it's a super deep movie or anything, but it certainly tries harder than most action movies.
As far as Games/Books being a bigger offender? I can see that, but if only because they're both much larger time investments. A movie you sit and watch for a few hours tops. Video Games and Books take way longer to read, and in most cases, are done over the course of multiple sessions, especially modern games. Shovel Knight is one of the shorter games released in the past decade, and that still took over 4 hours, longer than any of the LotR movies and those are considered "long." Video games have the added problem of costing way more than other mediums, so that further adds it in.
I guess by extension, a TV Series is more comparable to Books and Video Games for that same reason. You do them over multiple sessions, or you binge watch them and there goes your entire day.
Not the only reason but I definitely feel the time investment aspect plays a role here. Just my take on it.