[Railstar]

I would consider this a perfect opportunity for Disadvantage Embellishment Quirks to reflect a character who is ignorant of their flaws.

Curiosity and isolation is soemthing I would require a self-control check for. What's outside? What about now? And now? Now? Part of the problem with curiosity is nearly everything becomes interesting. The very fact that you can't see outside is reason enough to check outside.

Pyromaniac wizards being cautious with spell selection would be perfectly acceptable to me just because it's interesting. The idea that a mage would specifically avoid schools of magic due to the temptations it might cause them is something you can roleplay.

Generally, controlling circumstances to avoid psychological triggers is a large part of how to manage psychological damage, so I think it is perfectly realistic.