I can see that.
But I also see how easy the player character achieved this, so I presume other NPCs do this as well, in numbers great enough that some NPC probably abused it in the past. Hence paranoid magi would consider it, especially if they are on the defending end of Wizard's War. (Am I steering this thread towards Wizard War strategies?)
Sometimes I feel that Magi are too powerful, and are in a sort of genteel nuclear arms race with their amicii.
One mage invents something potentially dangerous, others develop a counter, and then others (for whatever reason) develop a counter to the counter, and so on.
Or perhaps I should really be playing a Tytalus or Tremere mage (one doing it for the challenge, the other playing chess gambits). I think I have some confusion about why I started this thread - this helped.