The Eight Great Sects of Xuan Country, no matter which one, possessed energy that was far beyond the reach of an ordinary person.
Ling Tian's decision to make a move against the Li Family, although 90% personal vendetta, the remaining 10% was also well thought out and only executed because it seemed feasible.
Others might not know the intentions of Xuan Country's military, but Ling Tian did.
No well-established, powerful nation would allow the existence of the Eight Great Sects of Xuan Country, with their immense individual power.
Suppression was inevitable, and uprooting them completely would be ideal, but the military of Xuan Country had not yet found the opportunity, or rather, they had not been prepared for the counterattack from the Eight Great Sects.