I think I perfectly did but this is how I (and probably others) see the suggestion :
"hey I often do that in mIRC, could this feature be changed so it's better for me ?"
This isn't a valid argument.
What if someone suggests "I often search for @window menu definition, could mirc search directly for "menu @window {" when I enter something starting with a '@' ?" ?
Also, the "find selection" option works with selection, so if you select foo, it will search for "foo", you're not selecting anything so mIRC guess and use the cursor position and the mIRC syntax to get the token.
