I taught in a large city for two years and most of my students (mostly elementary) were miserable with all of the hagwons and pressure and all that, but I just moved out to the sticks and the kids here are exponentially happier which is great! However they are nowhere close to the level of my city students despite having good teachers and great facilities. As much as I hate to admit it the hagwons (and the pressure) are producing real results. So, it is basically up to the parent to let their children have a fun childhood and fall behind, or be stressed to death and hopefully succeed later in life.