Well by Epic Wizard standards, going in a fight you're not prepared for against a powerful opponent who did prepare for that is a tactical blunder.
It is true that "I only got this one chance" was not a baseless assumption at all.
Absolutely.
In any case I think it's telling that even with Dorukan having no prep time, the fight was still fairly even.
Dorukan was competent, and all we see or hear about him show he spent his whole life protecting the world to the best of his capacities.
I think that's how we got fries with ketchup.