I agree with this if we are talking American superhero comics, but the European scene is decidedly different. Franco-Belgian comics are usually very pick-up-and-go, as are a great many of the homegrown UK ones. I think we're coming off a decade-ish where the massive investment in Marvel/DC 'verses have been eating up all the oxygen in the room for large comic book adaptions. Or just for general public consciousness attention for comics.
I am pretty confident that it's gonna turn around, but it might take a while on the large scale projects.
In my experience, it is easy to just pick up a trade paperback, one shot, subscribe to a limited series, etc. Even if you want to just jump in to an ongoing series, the writing and storylines are simple enough that you can usually pick it up in a few issues or just wait for a new arc.
Wages in Japan for animators are much lower, if not exploitative.
America is not the whole West, HN readers often forget it. Ditto with thinking on "Dragon Ball in the West" ended in the 00's when we the Europead finished it on mid 90's and began to watch Dragon Ball GT in 1999.
The Sandman (Netflix show), The Best We Could Do, Pride of Baghdad, Superman American Alien, Superman Red Son (animated), I Hate Fairyland, Bone, Epileptic, Paper Girls (turned into an live action show), Monstress, Saga, The Watchmen (turned into a terrible movie, an adaptation show, and an animated show), Stumptown (also got a show I believe), Daytripper, Maus, Berlin…
The biggest tragedy is that even incredibly popular authors like Brandon Sanderson don't get a chance of having their own animated series. Mistborn would work perfectly as an anime adaptation.
Marvel and DC historically created way too much consolidation which really limited creative output. And by this point people seem pretty fed up with 'capeshit'. Western comics are also incredibly hostile towards new readers, especially when compared to managa where you can just pick up the story and binge read the whole thing without having to pick up a million other things.