Spouse, our salvation comes in many ways, not just through suffering. I've had that same train of thought and it's done nothing fruitful for me, except attempt to depress me and make me believe that God = pain, therefore stay away from God or from prayer.
But I realized that good health, good husbands and happy marriages, financial stability etc... also render many good graces to mold our souls to sanctity. Good health can make you more capable of doing your daily duty or doing spiritual and corporal works of mercy. A good husband will encourage virtue and good habits in the home and in the family. A happy marriage will bear the good fruit of happy, well-adjusted children on the stable path to spiritual perfection. These bear very good fruit!
Suffering, wherever it may originate, does teach us lessons that we don't always learn when all things go well for us, but that is only one side of the story. There are lessons we learn from things going well too. The emphasis on suffering is not because it is necessarily better for us. It's because we have a harder time desiring it or being resigned to it or knowing what to do with it, so we need to have it explained to us, often and in detail, that we should also be happy and peaceful and resigned in suffering. No one needs explanation on how to be happy and resigned when things are going well! So spiritual instructions tend to focus more on what to do when things are going badly and why they go badly.