So the justification I heard is that there are many styles of ski jump, and some of the ones that’ll get the most distance are actually quite dangerous. For example, you can imagine that waiting until your nose is an inch above the slope before you put your skis down might get an extra meter or two of distance, but might also kill you if you’re a split second too slow. The fear is that if you leave players to their own devices, they’ll do increasingly dangerous jumps and landings to eke out a little more distance. To sort of save players from themselves, the solution was to put in a jury who would deduct points if you did anything crazy, like wait too long on the landing to put your skis down, so that there was nothing for a player to gain by doing dangerous jumps because they knew they’d lose anyway.
That’s the idea, anyway. It doesn’t always work as intended. Like with V-style for example: “In the 80s, this style of jumping was considered inappropriate by the jury, and although it enabled very long jumps, judges awarded poor marks to those who used the style.” V-Style ultimately turned out to actually be safer than the dominant styles of the time. But it took 20 years before judges stopped style-stomping it into oblivion, even though it was clearly resulting in longer jumps. These days it’s basically the only style of jump you’ll see.