Replying to Comp pros - why do you do the same dubs?

I don't want to downplay the technical difficulty of doing switch and straight left and right double corks - it's very sweet and skiing has come a long ways since I picked it up. That being said, I am curious for an insider perspective (competitor, judge, coach) on why comp skiers do very similar tricks? There are variations in grabs, Jossi had the carve today, Henrik will butter his dubs, etc., but the overwhelming majority are some variation on double cork 10/12. Sometimes people will throw in the 14 for a real banger, but I feel like the sport is in the same spot as the sw. 10 era, when everybody did a sw 10, and then TJ threw the 12 and 14 to try to step it up. Meanwhile there were a plethora of difficult 9s and 10s (mostly forms of doubles, pre-double era) that had not been done, and would blow away the sw 10 in a comp.

As was seen in dew tour today, a lot of people can do dub 10/12 very well. But other neat tricks have been done for some time, e.g. sw/forward dub flat, dub bio, dub misty, and high spinning (single) bio, among others. In the dub cork variety, I know some of those skiers have dub 7s. I see that as a decidedly harder trick than a dub 10 - do the judges? If so, why isn't it seen more in comps, and if not, why don't the judges reward a trick like that? Are these other tricks THAT much harder than double corks that skiers don't want to throw them in competitions?