The Christian obsession with dismissing observance as "mundane laws" (no doubt in some incomprehensible way obviated because Jesus lived or died or something) only reflects a deep misunderstanding of the point of the observance of the commandments.
Yes, one washes one's hands before eating bread, or upon waking, or at exiting the restroom (over and above the usual hygienic washing one would obviously also do at such times) not because the Rabbis have OCD, and not because they (or we) think God is excessively fond of washing. One does it as part of a system of incorporating opportunities for sanctification into every possible moment of our days.
Every small observance, from washing one's hands, to saying brachot (blessings, of which the Rabbis suggest we say 100 per day) over food, drink, and experiencing all manner of common and uncommon phenomena, to giving tzedakah (charity), to keeping kosher, to not wearing shaatnez (mixed fibers of animal and vegetable origins), and so forth-- all of these are opportunities for us to take a moment to break away from our everyday patterns of thought and action without thought, and instead to remember who and what we are, Who made us and the world around us, and to try and experience even the "mundane" facets of our lives as holy moments, lived in the presence of God.
The observance of the commandments, holistically, is not about obsession with detail or being bogged down in the material or mindlessly following laws for the sake of legalism. The observance of the commandments, holistically, is a system of spiritual discipline. Rather than being hopelessly material and mundane, it in fact is the exact opposite: an acknowledgement that even as material beings living in a mundane world, we are full of spiritual potential, and every moment of our lives-- even something as grossly ordinary as relieving oneself-- is an opportunity to see God in everything, to focus ourselves on the holy, to exalt our existence by using it as a constant series of tiny stepping stones leading to greater awareness of His existence.
Nobody can be spiritually aware and cognizant of their connection to the Divine just by deciding it. That's just not how human beings work. That's why the Christian idea that all you need is faith always seems like a joke to us. Nobody works that way. Spirituality as a practice is an art. And like any art, it demands constant practice, constant reinforcement. That's what observance is for, and that's why observance is built into even minor, everyday activities.
Feel free to keep making the same tired jibes about Pharisaic compulsiveness and over-legalism, though. They definitely haven't gotten stale over the past couple of millennia. All we take from them is the recognition that even after all this time, you don't understand Judaism at all.