Answer: If we did not suffer at the earthly level, we would never come to reveal the eternal state.
We need to go through these states so that they form in us and, most importantly, accumulate them so that we have enough power to break through the barrier between our world and the upper world. This has to be done both in quantity and quality.
We need to come together. Then it will be easier for us to gather all our desires and thus to break through, to make our way forward.
Question: Will man at some point even be thankful for the fact that he had suffering?
Answer: Yes. After crossing the Machsom (barrier), one begins to understand the price of suffering, effort, and resistance.
From the Kabbalah Lesson in Russian 6/24/18