What do you actually think allows moisture to stay in the air?
Think of it like this: A chicken hawk can soop down on a rabbit and lift it into the air. A chicken hawk cannot lift a rabbit into the air taking off from the ground. That is why you cannot use your chart for this, the chart does not take in all the factors.
You actually think there is the same amount of moisture in the air of Arizona and the state of Washington?
Your chart would be more closer to be right if the house had a high velocity air system but other than that living in the air handler on the average HVAC would the chart be right.