I'd say it gets a little different with command line utilities
maybe "utility" is the appropriate term here, but I'd call something like grep a program, not an application (again
"utility" also works).
To be sure, grep is extremely powerful, but its scope is limited.
I think large planes "look" like they can't work because their "relative speed" is really low
that is, their speed relative to their length. We're used to seeing birds cover tens of lengths per second, whereas a large airliner covers ~1ish per second at takeoff.
Or not, but this always seemed like a plausible explanation as to why planes look impossible. (Though given that hovering birds don't look funny, maybe this is a silly observation...).