I was messaging a friend about what ifs involving any of us being in the fantasy world Equestria from My Little Pony Friendship is Magic in one of their alternate realities. I don't have permission to share anything from his end about this, however this is a message I sent him.
"I doubt I'd be strong enough to defeat her in a fight like that if I were in that fantasy world, remember my OC is not a soldier, not even a Wonderbolt Trainee, my OC in my fan fiction is just some average citizen trying to live out a peaceful life, and if confronted by somebody as dangerous as that, what choice would I have? the best I could hope for in that situation, is provide a distraction.
I don't know about you buddy, how you make an OC is your decision not mine. But I would not desire to be in Equestria to satisfy ego or lust for power, I am not saying you would be greedy either. However that's not how I'd do things. And because of my desire for peace, even at the cost of my own ability to fight, I don't believe I'd be able to defeat Chrysalis, not by myself anyway.
Violence for self defence is justified, but as you said, if ego becomes a problem, then becoming corrupted means replacing one problem for another.
That is the reason why I would not desire to be a unicorn or an alicorn there. I am not saying Twilight Sparkle or any of the other Alicorns are inherently evil for possessing powerful magic, however I would be concerned about misusing it if I had it, even unintentionally hurting innocents is not something I'd be willing to gamble for the sake of power. Power requires wisdom to be used responsibly, if I lacked the knowledge to use it, if I lacked the analytical thinking Twilight Sparkle has, I would not be a reliable individual to use it."