Huhhh? Risk and luck are not at all obviously two sides of the same coin. How does this duality work at all??
Risk can be measured, modeled, etc. It may not be accurate, but at least it’s something you can define and attempt to model. Sure, sometimes you may behave risky and not even realize it, given that future events may be totally different from what you expected. But in reality risks are much more transparent than luck. You can’t go and plausibly seek out luck, but you can seek and easily find risk of any variety. Want some risk? Smoke a cigarette.
Unlike risk, luck is a far less tangible concept. How it occupies the same side of the coin as risk—I have no idea. Where do you go to get luck? Risk may yield reward, but why call that luck and not the “outcome”, which like all outcomes carries a certain probability. Luck is just a pseudo-religious moralization of outcome, mostly employed by people who are unlucky.