It isn’t necessarily that tropes are bad, it’s more like once you’ve seen a trope you can recognize the pattern and once you recognize the pattern you can more or less determine what’s going to happen.
Is the Hero’s Journey a bad trope? Not at all, as you’ve said — some of my most beloved stories are structured around the Hero’s Journey. I don’t know if you’ve ever heard of Redwall, but all of the books in that ‘world’ by Brian Jacques are very close to my heart. It’s also part of why I understand that once you’ve experienced at least one or two good Hero’s Journey’s — you’ve more or less experienced them all.
Is it wrong to be entertained by them anyway? No, I hope you don’t think I’m saying that.










So Cowboy Bebop is not a shonen. It’s a seinen. Trigun is a little odd because it shifted from shonen to seinen somewhere along its publication history.
I point that out because seinen/josei compared to shonen/shojo is more or less the equivalent of young adult fiction to children’s fiction.
Children’s fiction is supposed to be easy to understand. It should be filled with trope’s, kids can’t really empathize with things that are more complicated. Or maybe they’re at an age where they can but maybe shouldn’t, i.e. show with themes of suicide for an already teetering on depressed teenager.
All that to say that I think your family members perspective is… severely limited. Not watching Trigun because you’d rather rewatch Naruto is 100% their choice but… it’s a pretty stupid way to live your life.
“Pff, why would I watch these ninjas do magic? I can just watch space wizards do magic and fight with lightsabers. Naruto is trash, Star Wars is peak.” Or something.