The point made about the effect of doping on women versus men is well noted, but it is still very much circumstantial evidence and it ignores the fact that historically the women have always been consistently competitive, while the success of the men has always been cyclical. There have been 2-3 Jamaican women represented in the sprint finals ever since the 80s, and in or around the medals, regardless of how the testing protocols have changed, it’s no flash in the pan.
Bolt was generational, everyone saw him coming from a mile away. That he led a generation of other extremely fast Jamaican men naturally raises eyebrows, but let’s not forget that Powell was already competitive on the international stage for one complete Olympic cycle before the men began sweeping the sprints.
As for the men, while they have declined in the flat sprints, their current sprint hurdle depth is better than it has ever been and they have an elite long jumper as well, so we can see that the talent is still apparent in other speed-explosive events.