Which, as Pixel42 points out, matters only if there's some reason ahead of time why the standard poker hands will be the significant outcomes in the exercise. Jabba's game is that he assigns significance to the outcomes only after the outcomes are observed. And the reason for the significance is that they were observed and were, as he reckons it, unlikely.
In general, receiving a straight flush of a given rank and suit is no more or less likely than being dealt any other hand, including garbage hands. We agree ahead of time, for the purposes of playing poker, that certain combinations of cards are special in a way that enlivens the game. But those combinations are largely extrinsic to the inherent probabilistics of drawing/dealing cards. They're arbitrary, but agreed upon before the cards are dealt and drawn. The arbitrary significance matters only insofar as we are using the cards to play poker. Jabba wants to say that a certain garbage hand must be special because it was so very unlikely that he would be dealt it, from among all possible deals.
Jabba runs with the notion of predesignated combinations and says there are reasons he can post-justify the "value" of the hand he has been dealt. I.e., reasons why he's special. Instead, existence is more akin to simply being dealt five cards, with no indication that a game of any kind is being played. Then the cardholders are asked to evaluate their hands. No reason to default to poker; we don't know if that was the intent. Each can say that his hand was just as improbable as that held by any other player, or as any conceivable undealt hand. Absent any prior designation of significance, no player "wins" this game simply by claiming he has the most improbable hand. The conflation of probability/likelihood with significance is what Jabba doesn't get.