Indeed, there are cultivators who can divine the flow of spiritual energy, but this itself is related to the Heavenly Mechanism, involving the Path of Destiny.
Even Tribulation Crossing Practitioners cannot accurately determine the exact location of a cultivator, at most they can only know the approximate direction Lu Yi is in; the lower the Cultivation Base, the greater the disparity.
If their strength is even weaker than Lu Yi's, the location they speculate will likely be inaccurate.
Even for Tribulation Crossing Practitioners divining Lu Yi's location, the accuracy would only be within a hundred kilometers radius.
These cultivators all belonged to a powerful group called the Heavenly Origin Sect. The Great Mahayana cultivators within their sect are particularly adept at divination and have only managed to estimate Lu Yi's location within a radius of a thousand kilometers.
This caused the cultivators to spend quite a while before at last finding him.