Should we give International level education even for pre-primary?

I have been closely watching the parents of high earning caliber who wants to impart the best education to their only child and harp on selecting the International school as the basic for starting the pre- primary and we know the International schools would teach more on accent and less on writing and the children are losing the basics of strokes, writing and cursive writing. Over the course of time they could not able to write the contents freely and this what the mistake of taking admission in International schools. Moreover state subjects not taught at all.