CA,
The Posuk that is the source for this Inyan is Mishlei 21:1
פַּלְגֵי־מַ֣יִם לֶב־מֶ֭לֶךְ בְּיַד־יְהוָ֑ה עַֽל־כׇּל־אֲשֶׁ֖ר יַחְפֹּ֣ץ יַטֶּֽנּו׃
This Posuk might not be referring to judges and therefore judges might still have complete free will.
But, as we all know, Hashem runs the world while allowing humans free will.