I hold Tarot and Tarot card reading in the highest respect - in fact, in the final chapter of my book I discuss why - including the fact that I always capitalize the 'T' in Tarot - out of respect for my cards, my practice, and what I do.
This is not to say that 6 acolytes have to burn incense, wear hooded robes when they appraoch the Tarot table, speak only in Latin, and have not had sex for seven years before they can ask for a reading.
Your car is also a tool; is driving to the movies more noble than driving to the convenience store? Your kitchen stove is a tool; is making a large dinner more noble than frying an egg? Are you saying that unless it invloves a question of earth-shattering importance (in who's eyes, I might add) that merely asking a question about the status quo has no business being asked?
I understand the basis of your question - why not take some responsibilty for the more trivial aspects of your life rather than burden your Tarot deck with such questions as 'What color should I dye my hair? Should I get a belly-button piercing? or What flavor condoms should I buy?'
I may agree that we have or do sometimes trivialize our cards - but they are such a part of us that grabbing your cards can be the natural extension of your arm - for some of us. But if you only read because you have an earth-shattering question to ask - then you'd probably only do one reading every 2-3 years.