I echo the general sentiment that good food does not need to be complicated. If you use fresh ingredients and seasonings that compliment the dish, you don't need to depend on complex flavor layers.
I love watching Gordon Ramsay's Kitchen nightmares series, both the US and UK versions. In one episode he challenges the french chef of a failing restraunt to make a dish to present for review. This chef overcomplicated matters with over 20 ingredients, while gordon's version of the same dish only had a handful. The food critic reviewing the dishes chose gordon's hands down.
When I cook, I strive to keep things simple, although I do cook outside of the box and experiment to see what new flavor combinations I can make. I just keep myself on a leash. :P
A good steak just needs salt and pepper and perhaps a good marinade first for a few hours to help tenderize. Sauces, as another poster pointed out, were commonly used to disguise questionable quality of meat back in the days when refrigeration was almost non-existant.