From OBR definition of FAIR BALL: "A fair fly shall be judged according to the relative position of the ball and the foul line, including the foul pole, and not as to whether the fielder is on fair or foul territory at the time he touches the ball"
The purpose of the foul pole is mark the difference between fair and foul territory from the ground to the sky. It's a 3D demarcation. Being in line with the foul line but not where fair/foul territory change makes it a one dimensional tool. All but useless for anything close. It only helps with the more obvious calls.
Getting snarky, those aren't "foul poles" They are simply poles on the foul line extended.
https://www.dictionary.com/browse/foul-pole
https://www.baseball-almanac.com/dictionary-term.php?term=foul+pole
[Not sure how tall these foul poles are but feels like an occasion to find a contractor in the local baseball community and have an early morning field trip and then buy breaskfast]