No offense to OGD because it is often misstated with organic cannabis growers but pH is very important. It won't win you any friends by stating it though but it is the truth. Plants can naturally drop the pH through exudates, this is absolutely true but at a cost of time and lack of growth. By having the soil within the 6.0-6.7 range all is good from the beginning.
Most organic growers are growing with bagged base mixes that are buffered from the beginning so naturally they don't think pH is important as someone has already taken care of it but if they made a mix from scratch they would see, take one that is 7.2 and the other that is 6.5, they could see for themselves that the 7.2 is inhibited by the high pH and will be delayed.