It was just a matter of convenience.
A chance to use their familiar tricks.
Perhaps that was the thought process of whoever was behind this.
As for whether they'd succeed...
...they probably didn't care all that much.
If they succeeded, they'd get the person. If they failed, they could still ruin a part of his journey.
Then he'd pop up on their radar again later, and the cycle would repeat.
It was a bit much, but from the Li Family's perspective, that was more or less the situation with Jiang Man.
Jiang Man felt the Li Family was being a little too arrogant.
"How strong do I have to get to be free of all this?" Jiang Man asked curiously.
All his troubles stemmed from a lack of strength and prestige.
He had to enter the Sect, and he had to do it in a dazzling manner.
Only then could he avoid most of the trouble.
That's why he wouldn't hide his strength and just barely scrape by to enter the Sect.
