Risk is ying while the opportunity to be responsible is yang. You can't have one without the other.
If you have risk and you accept and deal with it, you are considered responsible. If you have risk and you don't accept or deal with it, you are considered irresponsible. If you eliminated ALL risk, then you deny any ability to be responsible.
Suppose scientists created a drug that counteracted ALL risk of eating "bad" food or over-eating. This drug prevented gaining unnecessary weight or any harm to the body from what you eat. If this drug eliminated ALL risk, what would it mean to "eat responsibly"?
Suppose scientists created a tool that removed ALL risk to drivers. This tool prevented drivers from crashing into anything, including other drivers. If this tool eliminated ALL risk, what would it mean to be a "responsible driver"?
Risk exists in any situation, no matter how small. Thus, there is always an opportunity to be Responsible (just as there is always an opportunity for Integrity and Respect).
IRR may be small enough that no one easily notices, but being there makes all the difference.