After doing some more research. Magic erasers ain't that magical anymore. It's actually act as a super fine sand paper like 10,000+ grids.
In which case, it makes much more sense scientifically, and is mush less concerning compare to chemical.
I also did a little experiment on an apple, just to prove the idea if this. And yes after rubbing back and forth on the same spot for about a min or 2, so maybe 100times?, the red color on the skin got lighter and juice starts coming out. But when I did it on my steering wheel, it only take maybe 2-5 rubs. So don't think it's thatttttt bad.
So if you were to do it, rub on the leather surface gently, and recondition after for best result.
After all, Mr. Clean is still a good friend.