Absolutely wrong. Relative humidity has a LOT do do with both how cool and especially how DRY the air in the cabin gets. If relative humidity is above 60% and the ambient air temperature is in the mid to high 90s or more like here in middle Georgia, the system will struggle to get that 20* temperature difference BECAUSE there is so much humidity in the air. You seem to forget the A/C system also dries the air in order to make it easier to cool. The more humidity, the tougher the system's job. An A/C 101 course will clear that right up for you.
