Some Ting Wong,
If you're not some 10 yr old at home on his computer. You do know we have a seniority list? And you do know that list has pages and pages of F/Os senior to the latest Skipper. And you can figure out they didn't all ask not to do command.
I think that proves Rods estimation of how many actually get past the panel and make it to the left seat.
Maybe it's irrelevant when you're first joining, the 97% getting command at BA, while maybe 50% get command at CX. Maybe RHS wide body time to go elsewhere is all that matters.