"Please outline the skills you possess that make you well suited to a career as a commercial solicitor and explain why you believe this makes Dechert the right Firm for you to develop your career."
I can totally see how it feels like a standard Why law/Why Dechert question, and I think that it's fine not to necessarily tie it to practice areas tbh, so I'd hold out hope instead of assuming PFO since you've tied them to your experiences. I think talking about training is actually more correct than practice areas now that I look at the question again, just the first part about outlining skills could make it mildly iffy, I think. That's the part that I think is hardest anyway.
I'm praying for your success all the same!