Does everything happen for a reason?

I read an interesting concept in the book called Fluke by Brian Klaas.

60 years ago, a man named Edward Norton Lorenz joined the American army's weather forecasting unit.

He created a computerized model with 12 variables like wind speed, temperature and a few more - to predict the weather. He would routinely run simulations on this.

One day, Lorenz decided to re-run a simulation and to save time, he started midway - while using the previous base data.?

Something strange happened.

Even though Lorenz set everything up as it had been before, the weather prediction that emerged in his re-run simulation, was very different.?

There was no mistake in his calculation.

After a deep dive, he realised that if the exact wind speed was 3.506127 miles per hour - when he started midway, it was rounded off to 3.506 miles per hour by his system. These tiny rounding off errors were causing huge changes in the weather prediction due to the interplay between 12 factors.?Imagine the permutations!

This gave birth to the "Chaos Theory" - that little things make the biggest difference, more than what we can imagine. It's also known as the Butterfly Effect.

Because small things can make such a big difference, the universe always appears uncertain or even random, to us.

We are often told that "Everything happens for a reason". Be it during heart breaks or when we miss opportunities - this statement prevails.

Why so?

Humans like you and me, cannot accept randomness as an explanation for why we get cancer or how we ended up with an accident. We cannot see those tiny decimal points from the Lorenz example. If someone breaks our heart, we find it difficult to accept that the cues were all there - we just missed them.

It's thus impossible for us, to move on from misfortune, without figuring the real reason for our suffering.?Establishing causality through logic becomes an instant response.

"Everything happens for a reason" is thus a coping mechanism - to help us make sense of this randomness.?

Conversely, research shows that we happily accept randomness as a satisfactory explanation when we experience something unexpectedly positive (e.g. Winning a lottery!)

What are your thoughts on this? Do you believe in luck?