I have, however, serious doubts that it can be a substitute for stimulants. ADHD affects so many parts of one's life such that attention sometimes seem a very small part of the disorder. Miraculously, at least for some people, stimulants create a kind of automatic improvement in other areas too. I hope that general discourse about ADHD moves towards easier access to those drugs, not replacing them.
Also, please don't speculate about ADHD, especially about people who suspect they might have it.
ADHD experience differ a lot among people and even in different situations for an individual. Because of this aspect, a lot of people have complicated relationships with their diagnoses.
Self-doubt, for various reasons, is a very common trait of people with ADHD. Strongly worded claims about ADHD might be very harmful to people who plan to seek help or struggle to follow their treatments.