Because they have no shame, dignity or self respect and would sell their own internal organs to get a headline in OK or to be on the DM sidebar of shame.
All three plus a few others are prime examples of a section of society who think fame is everything and dignity counts for nothing.
Well, you could say that Ryan Moloney- reduced now to appearing with Claire from Steps.
Doesn't abode well for the actors playing Karl and Susan, then, although Alan Fletcher did Soapstar Superstar so he knows the work he'll get in the UK.
As for Jackie Woodburne, appearing with Tamara Beckwith and zeleb nonentities like Jasmine Lennard awaits rather than a role in Silent Witness, a Bond film, a role in a US TV series or a Our Friends In the North-style drama- a sad shame for her, but she must know, like Alan and Ryan, the risks of staying with the soap for so long. How she'd wished she had done a Chris Eccleston like he did with Cracker (so he could do other roles rather than stay a la Jackie and be remembered as just David Bilborough-same thing with Dr Who)and got out before people saw her as just Julie Egbert/Susan Kennedy, because that's the 2 memorable roles she's done.