What you say is exactly right.
This is why some people are unable to get the correct results by repeating the “rice experiment”:
“The Rice Experiment (Video)“.
Experiments on inert matter (most scientific experiments belong to this category) can be correctly repeated by anyone. Those do not involve the “mental state” of the experimenter. Of course, the experimenter needs to competent in carrying out the steps involved.
But in the “rice experiment” or the “water experiment” that you referred to, the mental state of the experimenter plays a key role. One has to “put one’s mind into it”, rather than just following the necessary steps mechanically.
Our state of the mind CAN affect mindless things like rice, water, and plants. There is an interesting book, “The Secret Life of Plants” by P. Tompkins and C. Bird. They describe some interesting experiments with plants. But others have objected by saying that when they tried to repeat those experiments, they did not get the same results.
– That is because they were mechanically repeating the experiments, just like other scientific experiments.
– These experiments involve “mind power”.