According to Osho, there's no contradiction: the clash is linguistic, because we mistake sadhana for doing. Lao Tzu prescribes 'negative methods' - like counting to fall asleep - that don't create awakening but exhaust the doer, letting effort drop and non-action reveal itself. "Search for the center" only removes illusions; the center is already there. Techniques are ladders to discard.
Like using a boring counting game to fall asleep, Lao Tzu’s practices don’t make enlightenment; they just help you stop trying so your natural quiet shows up.