You would never know there is any chlorine in my pool, yet it is perfectly clean. The problem is most people use pucks which raises the CYA which is required to allow the chlorine to survive in sunlight, but CYA also makes chlorine less effective and it doesn't burn off as chlorine does. So people who use pucks just increase the CYA to levels where you need ridiculous amounts of chlorine to be effective.
The fact my CYA is perfectly calibrated and no more is added the chlorine is very effective without overdosing.