ADD is like global warming. Fake.
Some people are just better equipped to handle life and what it throws at us.
Some people can hit a 90 MPH fastball, some can't.
Some people can do calculus, some can't
...
Trolling?
Or ignorant?
Not all cases of ADD/ADHD are genetically rooted in an individuals neural system, true, or even a permanent part of it (for whatever reason). Improper diets (with specific deficiencies, like a lack of important essential fatty acids) can impart nearly-permanent neurological malfunctions, so to speak, but depending on severity/timing they can be "fixed."
But there are quite a few cases of genetic-origin (not necessarily familial - random mutations can/do occur) "malfunctions" in the CNS, in this case, improper neurotransmitter ratios.
If you have, compared to the "norm", too much or too few of certain neurotransmitters, or have low quantity or slow-acting receptors, that imparts certain "personality" or behavioral issues.
Sometimes we can make use of them, put them to work and make us shine. Some of the best creative geniuses have shades of bi-polar; ADD, Depression, and other "similar" syndromes can also be beneficial, but in many cases, they cause more issues and impart no benefits.
NT imbalances are real and factual, and not at all related to skills and talents (unless one can coach mild diseases into a helpful role - typically relegated to the creative arts of some variety).
Medication should be the last resort, but if it's a severe imbalance, medications can change the quantities of various NTs and impart a significant change in behavior and personality. Sometimes this is also to the detriment of the patient - either the medication is the wrong type, wrong dose, or those types of medications swing the imbalances into a whole different direction, instead of evening things out; in such cases, those are typically individuals who do not have a moderate-to-severe case and would be better off with a more hands-on coaching-style approach.
But why do I bother? Some people don't care to know or understand the realities of our life.