No Sir, you are missing the point of the N.E.C. if you correctly do the calculation and you use bigger wire it overkill and you wasted money!
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I just want to point out that using a bigger wire size than NEC recommends is NOT neccessary wasted money. The voltage drop on a long run may be within the N.E.C. limit, but you are wasting electricity. NEC allows up to 5% drop. It's fine if electricity is cheap. If you are off-grid where every watt counts, that's a lot of money going into the wire. If you do the math in how much you save in electricity cost vs. the extra cost for larger wire size, in some cases, it's a pretty good investment to go with the larger wire size.