It's possible to make a lot of the right moves without really understanding why they are correct, so of course you can win a tournament with minimal skill. I have seen people at the final table who got there purely on aggression. I have also seen tight players get to the final table by catching the right cards at the right time. Both were inherently lucky along the way.
I find that final tables aren't really the best and brightest of the bunch, you'll have a few who got there on skill others by the method described about.
Figuring out which one you are is pretty easy to do.
Did you catch cards? Or did you play solid?
Are you acting like a maniac? Or are you composed and deliberate?
If you are a maniac catching cards, that ain't skill, that won't replicate.
If you were solid and deliberate, that is skill, that will replicate.
For this reason I don't judge wins or losses, but consistency of play style, and the ability to use reads and create effective counters and folds off those reads.
Spend a long time figuring out how credible you are, but not a long time figuring out how incredible you are.
Wins are nothing at the end of the day, cuz tomorrow you have to get up and play your best yet again, having a slightly bigger
bankroll doesn't make games easier.
In fact, after big wins most people backslide.
It is in your best interests to just not make too many conclusions about your skill level without having a broader perspective and proven ability to gauge these things accurately.
My short answer is, yeah, you can win only luck, like 1 in a 1000
But better players will win in less than that, like 1 in 50
That kind of winning percentage comes from tight foundations multiplied with things lining up.