[quote=Sherlock Holmes]
Sites like this are usually lousy with wizards, but none of them want to come forward and admit it.
[/quote]

[2] The Guild are big on people on like to sit down and write a lot.
But being a wizard requires you to sit down and read a lot, and often sacrifice any kind of social life for the sake of better magic.

And if you base it off things like Fate Zero... Your potential to be a wizard is mainly dependent off your blood. So you can genetically be a horrible or great wizard.