Why do celebs who've sexually assulted/harassed people wait 'til the last minute to get help?

I believe it is when their career is on the line. The new notoriety changes the minds of their fans. They may not truly seek a cure or a change. They merely want to be loved by ALL.
I will continue to watch Bill Cosby whenever I see him on T.V.
The questions arise; Why did it take so long for these girls to go PUBLIC?