Welcome to TFP! Good to have you here
It's active chlorine that does the sanitizing. If you live in a city, the water coming out of your tap has more active chlorine than a swimming pool, because tap water has no CYA. In the pool, CYA binds the vast majority of free chlorine in an inactive form and releases it as the active chlorine is used up. This achieves three things:
1. Protects the chlorine from extinction caused by ultraviolet light
2. Maintains a reserve to cover variations in chlorine dosing, bather load and organic contamination brought into the pool by leaves and the like
3. Reduces the "harsh" form of chlorine (the active chlorine, primarily hypochlorous acid)
The pool industry has largely failed to recognize the mechanism and importance of this relationship for over 40 years. It's not new. Experts from here and elsewhere have lobbied for change with little success. TFP recommends methods that are safe and reliable, based on experience from 1000s of pools and backed up with sound science.
If you want to dig deep, you can at this thread:
Pool Water Chemistry
If you follow TFPC recommendations, you'll have a safe, sparkly pool that won't turn green the day before a party. Your pool will never smell like a motel pool, and it will definitely not bleach your swimwear.