Why would you want an image-manipulation feature in a text editor (unless you were a developer who thought that it'd be a fun thing to work on)? That sounds like bloat of the worst kind...
While it is true that dedicated applications are usually more capable and convenient for specialised tasks, having tools integrated together like in Emacs also has its strengths (e.g. it can allow for heavy scripting of a workflow).
- image cropping in an image viewer is useful if you'd like to quickly crop screenshots before posting,
- you can already view images in emacs.
So the irksome bloat is likely already there, and stems from emacs not only being a text editor, but an operating system onto itself.