You’re looking at the full mc package rather than just mcedit. Even then, Midnight Commander is absolutely worth that whopping 7.9MB of space it takes for all the functionality it provides.
Openwrt is not an example to use to compate against a package size, as it’s target built to fit into small firmware storage spaces on all sorts of random hardware. That’s comparing existential philosophy with oranges.
Would you download a car?
We call that Arch.