The figures about conductors signing OBS contracts do not take into account those will go on to take voluntary severance (a not inconsiderable proportion) and those who are staying in the role and thus were not offered OBS contracts (not too far under half of the conductors).
A cumulative equivalent of several depots' worth of conductors will still need to be retained in their current roles in order to be able to operate the doors on stock which requires it, or on routes where there is unlikely to be agreement amongst all parties to go DOO(P). To be fair, though, I would not be surprised if these numbers dropped in the future.
A significant number of the conductors who I have spoken to who were eligible for the OBS role state that they felt they had no choice in order to secure a job for roughly the next few years, and were effectively forced into it until they can seek something else. Some have suggested (I can't confirm it; I don't think anyone would be able to!) that many contracts had statements to this effect added by them. And almost every single conductor I have spoken to, retained in either conductor or OBS roles, would appear to be actively looking at recruitment sites, as well as many others.
I will not be drawn into explicitly commenting about what this says about staff morale, potential staffing levels, and turnover. What I would point out is that any member of the public could poll conductors for their opinions and views, and I would be surprised if they did not come away with a similar picture.
The upshot is that conductors are not hypocritical, but are protecting their livelihoods in the best way they can, until such time as other opportunities might become available. I can assure you that it will be hard to go about finding a conductor who wants a new role which is less essential to train operation, or with less training, or with no authority to control movements in the interests of safety and security.