Excuse me for using another Harry Potter analogy, I could not think of a better one to explain the difference between ambition and calling.
A squib might have the ambition to be a wizard; however, it would not be his calling because a squib has no magical talent.
The same is true for a Lockhart in thinking of himself as a great wizard; however, it would never be true, just not gifted enough.
And a Professor Trelawney might imagine she can read the stars and mess up its design; however, she lacks the power to change what is actually written in the stars.
A few students may believe Trelawaney's vague predictions; however, more likely anything that came true was self manifested.
When practicing sabotage or game cheats by replacing a Dumbledore with subpar wizards, the outcomes will never be good, let alone excellent.
Too much ambition, not enough talent.
P.s.
Also not sure why anyone would think a Nostradamus is any part of Da Vinci's creative process or help in any way his creations, because reading is not the same as writing and is not figured in the creative processes.
