I don't understand why I can't become a world class mathematician or pianist after just a few months of practice and a photographic memory.
Hmm, in that case it seems your knowledge of those areas and what it takes to gain skill in them is very close to zero.
It's also worth mentioning prodigies aren't prodigies because they have a great memory.
If you check wikipedia, the very existence of a photographic memory is highly debatable...
Only one person has been "proven" in a semi-rigorous scientific test to have a perfect eidetic memory, and apparently you married the researcher afterwards...
which of course raises questions about subjectivity.