According to Osho, we cling to the mind because the ego fears dissolving into the vastness of Tao. Like a dewdrop before the ocean, we prefer a cramped, suffering identity to losing the small me in bliss. Mind is the ego's process, a wall maintaining separation through struggle and ambition. Flow happens in no-mind and love, but the ego invents safe substitutes to avoid the freedom of surrender.
Because melting into the big everything feels scary, our little ego chooses thinking and control, building walls instead of relaxing into loving openness.