some gray areas where science can't provide a logical explanation so as to why this is happening to some of the life events.

Not really sure about this one. Science doesn't have answers for really big questions, like why does the universe exist. But for stuff smaller than that, like "why do I have some disease", or "why did I lose a loved one" ... or just "why did I lose 200$ dollars at the casino" well science tells us a lot about how it's all one giant lottery we have been playing involuntarily, and we are all really bad at it.

We take chances just by existing. It's literally called a genetic lottery. We take a chance by getting in a car or stepping out onto the street to go to the market. Just by loving people we take the chance that something could take them away. Life deals you a hand. You win some, you lose some. You don't get to decide what your odds are. The best you can do is play the hand you've got. Which to be honest, is a lot less control than we tend to think we have. And even then, most of us don't play our hand all that great, cause we are thrust into the game of life without a practice round. And we are often too young and arrogant to listen to those who have come before us who already learned the hard way. Worse yet, we see few of our peer's mistakes, so we have a poor sense of what success and failure really looks like.

Science tells us about the gambler's fallacy, the human bias towards falsely thinking that the universe tends towards some kind of fairness or equilibrium which is patently false (consider how little the gambler expects "good luck" to turn bad, therefore why gamble at all if it always equalizes?). Karma doesn't mean the universe owes you exactly what you put in. Life doesn't hand out exact change.

Science also tells us about how we (humans) don't truly understand randomness. In nature, successive repetitions of some outcome of luck are vastly more common than we tend to think they are. We see a series of bad luck outcomes and say "that's not natural, this can't be real" when in fact it is often the natural laws of the universe on full display.

Despite it all, even if the game of life makes no promises to you at all, it sure as hell is better than not playing the game at all. Regarding karma, the only thing you can be sure of--and forgive me for using a dead meme but it is apt--is that you miss 100% of the shots you don't take.

Edit for the pedants: gambler's fallacy actually means that past results of independent events do not predict future outcomes, but that's basically what I just said.