A man touches a fire, and gets burnt. Next time he winces while watching another man touch the fire. Eventually, he burns meat and makes food.
Suffering is a process that yields lifetime lessons and empathy. It’s a negative-feedback loop for your brain development, which is like a car going the same speed on cruise control even though it’s driving on hills of ups and downs. The more you’ve suffered, the better you can react to difficult situations, and the more likely you are to have deep meaningful relationships. Happiness isn’t a life free from suffering and full of pleasures, rather a life full of rich relationships–if you think I’m wrong then talk to me on your deathbed and tell me which one you wish you had more of.