*sigh*

Abdula... remember a Kage Bunshin splits your chackra... too much of them and you can die.

Naruto can make tons because of his freakish chackra storage.

Its impressive that Konohamaru can do it because he is just a normal genin.
Combine it with a Jutsu that requieres tons of control and chakra...

And he is still standing afterwards.

Yes. Anyone can make those two jutsus. But they requiere so much chackra they can kill whoever uses them without control.