Right now I’m enjoying reading some old (1960s-1970s) science fiction novels. Adventure stuff. I’m on book 3 or the Dumarest saga. This is not “high literature”, but honestly, it’s not too bad. It’s not even “hard SF.” But they are really quick, fun reads. I’m getting ready to run a Traveller RPG game, and these books are really great at world building. Considering that a lot of folks would call them “pulp” literature, this series actually contains some reasonable moral/ethical dilemmas and social commentary. Not saying they are deep. But they are not completely devoid of thinking. Yes, they are pretty sexist. Not in a “let’s abuse the ladies” way — more in a “strong man protecting woman” kind of way.
All that being said, you don’t have to think a lot to read these. Which is fine.