Most chicken sold is pumped up with water (because water is cheaper than chicken). To bind the water, they add a ton of salt. To counteract the salty taste, they add sugar. As a side effect, it makes skinless boneless chicken breasts less likely to dry out if you overcook them slightly.

The end result is that most people find the taste of non-pumped chicken unappealing, because they're simply used to the faked-up salt/sugar chicken.