There was a total of 52 sects in the alliance of sects in the Hengliu galaxy, and they were all the top sects in the galaxy.
Whether it was the Lightning Knife Sect or the Thunder Knife Sect—or even another sect altogether—they were, at the end of the day, but one of 52 sects in the alliance.
While it was true that the genius disciple from the Thunder Knife Sect, Han Yuzheng, was unnaturally strong, there was simply no lack of competition from the other sects.
In fact, there were probably people stronger than him, though not many of them existed.
There was Mo Yitian, for example. He was the first among the younger generation of the Tiansong Sect and was less than 30 years old, but he was already a late Dharma adept who had trained his Dharma power so well that he could execute the Dharmic possession technique. If a comparison had to be drawn, you could even say he was no weaker than the Thunder Knife Sect's Han Yuzheng.