If the user misses the v and hits the c (side by side on common keyboards) they lose what is in the clipboard, which may be a disaster if they had cut not copied that content. At the very least its a hassle to recover and requires the user remembers exactly what they had in the clipboard.
See #197 especially https://github.com/geany/geany/pull/197#issuecomment-31388209 and others.
But it certainly copy word could be made available, and even bound by default to some other keybinding.