Question following the Rabbi’s podcast

Hello, Your Honor,
I listened to one of the podcasts that the rabbi was a guest on.
The rabbi was asked why there is evil/suffering in the world. His answer was that because there is free choice and because the world operates according to a system of laws that God created, if we choose certain ways then certain laws are activated and thus evil and suffering are created because God does not intervene in the world and according to what people choose to act accordingly the results are good or bad. If He were to intervene then free choice has no meaning because every time something is bad then He corrects it and it turns out that the world does not operate according to the laws that He Himself established. So what meaning do these laws have? He could have not created the world at all or created a world that does not operate according to what He Himself established and changes every time there is evil. (My note: It is also possible that this evil is not really evil even if it seems bad to us because in the overall calculation it benefits other people even if at the moment we do not understand how).
Overall, this sounds logical, but the question is, if so, what is the meaning of the prayers? If a person is sick and we pray for him, we are actually expecting God to change reality for him, that is, to intervene in creation. But we said that given a set of rules that He Himself established, He cannot change the game in the middle.
A possible answer could be that the moment a person prays, in his very prayer he changes the reality that is subject to the laws and therefore that person will be able to heal. Or for example, if now Torah and mitzvot are multiplied and rights are multiplied, then in this way we will change reality and then he has a chance to be healed. But this is a bit similar to Haredi claims that advocate increased Torah study when there is a war instead of going out and fighting. In the end, the world does work according to nature, so where do prayers/Torah study/multiple rights, etc., come into play here?
I would be happy for the public’s attention to the matter.
Thanks in advance.
Amir