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besides, this is /c/ (a board dedicated to dumping images) if you want discussion then there are boards specifically created for that.
you won't get heavy discussion in most threads, but some light stuff always pops up. the only complaints you'll get would be if you're not contributing to a thread at all, but still bumping it or if you're shitposting (which most boards don't like that). so long as you keep posting images, not a single soul will tell you to stop talking with other anons (at least i haven't been told to stop talking in my years here).
the witch thread has discussion on WWII ace history and general aviation at times, the eva threads have arguments and low quality shitposts (current misato thread is like 95% text), vallhalla thread has minor discussion on the game, the kemono thread talks about different types of animals and argue over what is/isn't kemono, lwa thread has minor shitposts and silly posts, the homura thread has some of the kindest anons on the site, the busty thread doesn't have a ton of discussion but there is a post asking anons who their favorite girl is (the kancolle thread does the same).
>tldr
there is no rule against discussion (there is against lewd - GR5, /c/ #2)
board culture isn't against discussion
no one is stopping you from starting a discussion
just attach a picture and enjoy /c/ with all of the anons here
have fun and relax!