Why not just run a recursive grep? That would save having to invoke grep on every single file found.

    findit() {
        grep -iHR $1 .
    }

Alternately, you could use the '+' variant of -exec in order to batch files together to be processed together.

Right. There's no need to write a whole new tool just to simplify invocation for common cases. For a guy who uses the command line "a LOT" he's not making good use of his shell.

Is this not equivalent and avoids running grep(1) once for each path?

    find -exec grep -iH ${1?} {} +

Though it still runs grep on directories.

Author possibly meant something like this (but yeah, same idea) fffind () { find . -regex ".$1."; }