absolutely not. the player with the higher possession percentage just means that they were able to take the ball more than his/her opponent, as well as keep it for a longer period of time. this does not equate to being a better player. and no, those with lower possession percentages who still come out victorious does not necessarily mean their passing skills are under par, nor does it necessarily mean they are lucky. on the contrary, it could mean that they are just more proficient at scoring when they do have the ball. For example, consider this hypothetical situation: In a match, Challenger A scores each time he/she has possession of the ball. Challenger B, on the other hand, scores only once out of three possessions of the ball. If Challenger A comes out the victor, he/she would, mathematically speaking, have the lower possession percentage. As you can see, Challenger A was not lucky in this particular case (even though he had the lower percentage and still won), but was victorious because he was more proficient in scoring. This demonstrates, then, that victors with lower possession percentages may not always attribute their wins to luck and poor passing skills. I hope this helped.