Who's to say are "natural" state of mind is better? As far as I can tell the natural human state of delusion, ignorance, and greed cause suffering.
And of course concepts are useful. If the Buddha had just said "What I realized cannot be conceptualized, therefore I cannot help you" we would all be without hope. The fact is what he taught can't be conceptualized. The actual experience that is. He just used concepts to get it across as best he could. But whenever you read a Sutta and the Buddha expounds on a deep subject you don't just read it then become enlightened. You only get theoretical knowledge via concepts, you need intuitive knowledge(actual experience of it) to overcome suffering.
Something most people realize, usually not to long into meditation, is that we focus on concepts and not the actual experience. When you drop the concept and simply experience you actually see reality. There is so much more happening than you realize when everything is simply a concept. Take a look at this quote:
On the first trip abroad the author accompanied Sayadaw on, we stayed one night at the cousin of the King of Thailand. At the Bangkok airport, she asked Sayadaw a question,
"If you were to give the most concise, the most clear explanation of the nature of vipassanâ possible, how would you do it?"
Sayadaw had the king's cousin open her palm and then make a fist. "What do you perceive?" he asked.
"I perceive tension and hardness, Bhante," the king's cousin answered.
Sayadaw had her spread her hand, "What do you perceive?" he asked again.
"I perceive loosening and movement, Bhante," she answered.
Sayadaw told her to slowly, minutely and mindfully make a fist and open it. "What do you perceive?" he asked again. She answered, "Other than coming to perceive even more the tension and hardness, looseness and movement, I came to perceive hardness and softness, warmth and coolness."
"That kind looking to perceive the natures which are, as they are, is the work of vipassanā," Sayadaw said. When he said that, she understood well the nature of vipassanâ. She was extremely pleased with Sayadaw's ability to give such an immediate and experiential explanation. Most people think that vipassanā is extremely difficult work. It seemed that the Thai king's cousin had thought that way, too. Apparently, she concluded that though she had thought it difficult work before, now that Sayadaw had explained it, it was quite easy.
Excerpt from "One Life's Journey", chapter on Vipassana.