For a group of people who are at pains to promote the idea that you can not separate mind from body, this seems... lacking. Structure and function are indivisible — an idea that has been in basic medical textbooks for decades. This can be anywhere from the level of gross anatomy (eg the heavy load-bearing, "single-axis" function of the knee joint vs the lighter-weight, freely rotating shoulder joint), through to the ultrastructural and biochemical levels (eg mitochondria, DNA, signalling isoforms).
How is type II diabetes (my blood sugar gets too high) different to POTS (my heart rate gets too high)? Neither has a directly and simply observable structural causative pathology. So they use the term "organic". As far as I can tell "organic" simply means that medicine accepts that the cause is biological and that this is unarguable.
In the DM2 case, glucose, insulin, HbA1c etc are measurably abnormal (plus downstream damaging effects) and you'd be foolish to try and argue a psychogenic cause for this. Not a heck of a lot of difference from my HR measurements, which rise variably and strikingly at times with simply standing and walking around the house.
Passive measurements over 4 years via wearable technologies show normal stable HR responses to rest, light exertion and heavy exercise for the first two years. For the last 2 years they show my resting HR slowly rises and falls during the day, while I am merely sitting at a desk and reading/typing. On a longer timescale it also shows a "sine" wave in my resting HR that has a 6 month periodicity. This looks to me as if it could correlate inversely with sunshine hours in the southern hemisphere, with a lag (peaking in November and minimum in April).
But no - I have developed a pathological fear of standing up.
