could be it's a cynical attention grab, but I suspect (and hope) that it's more part of his therapy to come clean so he can move on personally.
A lot of people can suffer serious depression from maintaining these lies over the years and in the face of public expectation of both performance and moral standing. The pressure can be unbearable. Often the only way to move beyond it is to take the cork off the bottle and release the pressure. Public admission is one way for someone in the spotlight like Floyd. If he is being completely honest now then that's more important for his mental health than whether the public believes him. His mum on the other hand……
The timing would always be bad but I agree, middle of the season is worse than most.
So few of these guys actually make a fortune out of the sport, you wonder where the pressure comes from that so many of them do this. Can't be for the fans; I know not one cycling fan who enjoys seeing riders pulled mid race for doping offences or shrugs their shoulders when a 25 year old stagierre had a heart attack because his blood is thick as treacle. I can only assume the competitive spirit alone is driving them, which is pretty close to mentally broken if it's pushing you that far I think.
glad I'm a recreational rider without the talent or drive to get mixed up in that world. Not sure I could take it and it seems that Floyd couldn't either.