I think there is truth in that.
Bolt has been good for marketing and PR, but IMO he should be viewed as only one step toward greater global marketing.
He has re-introduced t&f to the world, through his exploits at the Olympics.
Now think if sprinters from Japan, France, USA, Jamaica, Canada, England, and especially China, actually had a fighting chance. And I'm talking in the 100m, not in other events.
Now I don't know if on a level playing field they would actually perform well. Nobody knows that, because there hasn't been a level playing field as long as any of us has been alive, except for maybe Ed Whitlock.
But it's time for a new paradigm, and it should and can be one in which the IAAF and IOC can thrive to an even greater extent than they have in the Bolt era.