...people talk about poker like it is the only game that has a little luck involved. I would argue that every game has a little bit of luck to it.
Imagine if you were playing a game of (American) football. 1st and 10, you do a run up the middle for 4 yards. One of your offensive lineman kind of held the opponent (which is supposed to be a penalty) but the ref missed it. If the penalty was called it would be 1st and 20, but now it's 2nd and 6. What is that? It certainly wasn't skill, it's a little lucky.
How about if the quarterback makes a terrible throw, right to the defender, and he drops it. After your skill (or lack of skill) on that play, you should probably have turned the ball over, but got a little lucky and get to keep it.
The difference in poker is that everything is very defined. By that I mean, if you get your money in bad, you can calculate just how bad of a spot you're in. If you call an all-in bet post-flop with a 15% chance to win, and you end up winning, that was extremely lucky. And you can tell just how lucky that was by looking at how bad of shape you were in when you called the all-in.
And the whole "luck-factor" isn't as concretely defined in football, basketball, etc as it is in poker, but I believe that it is still there. But those games are obviously skill-based, as the team that is the better skilled (or favorite) should win more often than not. Isn't that the same for poker?
I don't know, that's just my weird abstract opinion