I see your point that a vegetarian diet can survive without eggs :).
The myth is in the belief that the proteins need to be combined "in the same meal" to optimize the complete protein chains, not that they need to be combined at all, correct?
Seems it is widely accepted by the majority in the vegetarian community that plant proteins do need to be combined for optimal complete amino acid chains, just that it is not necessary that it be within the same meal.
Also community, i would still love to see feedback on the other questions as well :).