Easy there, buddy. When I said Amauri is capable of scoring many goals, I gave reasons for why I think this such as physique, aerial ability, etc..
In other words, I said he has the makings of a good striker.
Say this kid born into a relatively wealthy family is exposed to a proper education from a school with the best teachers and best facilities in the country.
I would be perfectly rational in assuming that he will receive a proper education or that he will succeed financially in life even though I know nothing about his previous academic scores etc..
Same goes for Amauri. He has the correct attributes that would make a good striker, therefore, I wouldn't be surprised if he did well.