I am quite surprised by some of the attitudes on here about intelligence /work etc. There seems to be an assumption that intelligence has to be displayed by working in a high powered professional job using analytical skills. There are many sorts of intelligence. Someone who does not enjoy soulless office jobs toting up figures or climbing the 'ladder' completing in a cut throat corporate environment may have other talents. Creative talents, an affinity with people, caring and nurturing talents. They may enjoy working in a field which involves self expression or working for the good of others on low pay.
Where does this assumption come from that the RF are all 'thick'? Many of them probably aren't the brightest buttons in the box, but it's a bit arrogant to assume because someone isn't working in a high paying professional job all the hours that God sends, is 'thick'.
Kate has a degree but perhaps she is showing intelligence and aptitude in the role she is in, which though privileged is very difficult in my view. It requires people skills, nouse, and fortitude.
Acting can be a vacuous profession, but it is also a highly skilled one, particularly in the theatre. A part in East Enders or a soap is perhaps not the same , but actors are in the main skilled professionals. Most of them never make the 'big time' but struggle on, because they love it.