Hey, great job, you just took it to the other side of the spectrum! But seriously, it's a question of evidence, in every case you mentioned. The null hypothesi

Hey, great job, you just took it to the other side of the spectrum! But seriously, it's a question of evidence, in every case you mentioned. The null hypothesis being "nothing is wrong", which you seem to be pointing at. There are definitely cases where the null hypothesis is NOT true, and needs to be rejected. To muse about whether the evidence is enough is surely an appropriate practice, which seems to be what the author is doing.