The easiest thing to point out is how it's standard practice to share E6 links as sources for artwork instead of linking to the platforms the artist is actually on when people share artwork on other sites. It's especially bad on Reddit.
Also, the "tag what you see" policy is absolutely weaponized against trans artists snd their characters. I n top of that, because e6 is a "source" the misgendering of characters abd if artists then gets carried over to other sites.
I agree with you, no one should link to it when sharing an image. The only reason I do like e6 is that it’s the best we have for searching. I use a website called sourcenao to find the artists of reblogged artwork & it will link to e6 which does have an image source on each page.