Everyone had their limits, but not everyone could reach them. The potential that most people could reach in their lifetime was far below their limits, and only a small number of geniuses could reach their limits.
Those were already the minority among the minority. People like Chu Yunfan, who constantly broke his limits and raised his limits to a whole new level, were even more unique. They were formed by many fortuitous encounters and coincidences. It was impossible for normal cultivation to reach this level.
In terms of cultivation, every stage was the foundation for the next stage. If one could not reach the peak and breakthrough in a hurry, then the achievements one could obtain in this life would be very limited.