I think rumba's reputation as a bad dance for male celebrities is way over-stated.
1. Only two men in 10 series of it being danced have been eliminated on a draw of rumba alone - Paul Daniels and Jason Wood. By contrast in the same period, 5 men have gone out on the cha cha, and the same amount on the samba.
2. Most (not all, admittedly) of the strong male dancers did at least a decent rumba. In some cases (Harry, Colin, maybe Matt Di Angelo) it was their best of the latin dances.
3. Whenever I think of a car-crash rumba, my mind goes to Letitia, Georgina or VORDERUMBA, rather than anything any man did (except maybe Ricky Groves)
4. I'm fairly sure Ben's limitations have already been exposed.