I wouldn't worry about it kochab, you just come off as a rude person in general so it can't be personal.
On topic, if anyone here believes 10 grams to be the maximum potential of a plant started from seed, then bound roots are, in fact, a myth. At some point a healthy plant will grow too tall and will need a stronger root base to support the mass of the plant, and it has nothing to do with skill, nutrients, lights, etc...
The only way i will be convinced is if you show me an 8 foot sativa grown in a 16 oz cup. Actions speak louder than words and a pic is worth a 1000.