I'd have put it a little more succinctly.
The null hypothesis essentially states that there isn't a relationship between two things unless it is shown statistically to be so.
One does not start off assuming something (like a drug) is effective. One starts off assuming there is no effect, and that the onus is on the data to show there is some efficacy.
Sort of: it ain't so till it's so.
It is critical to objective research, and it exactly the thing that many fringe proponents here don't employ when it comes to paranormal phenom.
Of course
Because the paranormal is beyond just mathematical statistics .
It is a real thing .