I don't use One Step No Rinse Cleaner, which yes, also sanitizes, but I do use a true sanitizer - StarSan, which also says it doesn't need rinsing.
I always rinse after using StarSan. Clean, pure tap water is considered sanitary already. Not sterile, but sanitary.
Here's why I rinse. I look at things from extremes - since it doesn't need rinsed, it is safe and OK in the wine. OK, if that's the case I should be able to get by with topping off with it, right? After all, it won't hurt the wine.
Or maybe I could use it instead of water to bring a condensed bag of kit must up to the 6 gallon level.
When does using a little start to accumulate and become too much?
For topping off? One might say, well that's an awful lot; an extreme. If a little bit in my wine won't hurt, why wouldn't a lot also be OK. My point is if a lot of it would ruin my wine, even a little, used over several racking and such, could add up and have an adverse taste affect.
As I said, extreme. But the logic behind this works for me.