A very good question and the best answer. Salt chlorinator makes chlorine the same way a chlorine factory does. The difference is that it is manufactured in your pool and it is 100% pure, whereas chlorine is approximately 12.5% pure. The main problem is not chlorine, it’s the by-products that come with chlorine when you buy it from the shop.
You get “Chlorine” from a Salt generator but in its natural in form of gas and free from products that are harmful and can cause CANCER over a period of time in some cases.
End of the day the sad truth is “Chlorine” is the best sanitizer when it comes to kill the bacteria, however, again a UV added can do much to it by killing the chloramines and reducing the usage of chlorine significantly.