I'm not certain I agree. For one thing: if the authorities investigate the Dark Room shortly after Chloe's death, Kate may learn what was done to her and be dissuaded from her suicide attempt. More importantly, in my opinion, Max would be able to reach out to Kate more in the weeks after that day, and offer more emotional support than she would have had the events of the game not taken place.
I think Max taking into account what she learned with her powers to save Kate fits very well with the arc that the game tried (and in my opinion failed) to develop for her: she realizes that her true power lies not in her supernatural abilities but in her capacity for compassion and determination to do what is right.