Not necessarily because the band 8 positions will be even more dead end and be paid relatively poorly compared to the private sector.
I've seen a few interesting band 8 roles in the past but the pay has always been a stumbling block. I mean say you are in the private sector doing the equivalent of a Band 6 role, looking for a step up. You're talking maybe Band 8d or whatever before it gets feasible on the money side, but those tend to be quite senior in the NHS. It's a bit weird really, they don't pay enough to attract much talent from outside the NHS but presumably it is also rare for people to 'jump' bandings i.e. go from 5 to 7, 6 to 8 etc, so it must be quite a slow road for some people.