The existence of Halakhic Man is firmly centered in olam ha-zeh, which he tries to fill with sanctity by realizing the ideals of the Halakha. Religiosity which does not concern itself with man's physical activities, social interaction, etc., will thereby withdraw from engagement with the outside world and will not be able to sanctify it. It will encourage man to view his physicality with contempt, as a barrier between his soul and its ultimate felicity. Furthermore, an otherworldly religiosity leads one to adopt a quietistic mystical approach which looks inward while ignoring the reality of others' suffering. Judaism finds this morally repugnant, and instead enjoins man to engage in tikkun ha-olam, mending the world.
Habitual observance ingrains moral and religious sensibility into the very fiber of the personality.
Therefore, any ideology based on the premise that man can become a purely spiritual creature is inherently false and doomed to failure. By focusing solely on man's contemplative-spiritual side, it fails to acknowledge the strength of his inner drives and passions. If religion does not provide man with an objective framework of action, containing specific divine norms, it will at best be vague and transient, and at worst will lead to the most horrible excesses. Religiosity lacking an objective-revelatory foundation, which obligates one in certain actions, cannot conquer the animal in man. The Holocaust can serve as proof of this.