I think the context in which he said this probably is significant.
Until very recently, it was widely believed that those who doped in Kenya did so to break into the elite category in the country, as they were struggling to compete.
Therefore, it is likely that Canova was right to suggest that it was those with less-than-ideal resources/situations would be the ones who would benefit most from doping. Those already at the top (assuming they are there clean), did not need to dope, as they already had the best coaches, best facilities, best financial backing, and were significantly better than others on the world stage.
This was a few years ago, however, and we know the landscape has changed. Those at the top ARE doping (if they weren't already before). This might be due to increased competition at the top end, and the struggle to stay at the top, or due to increased international competition, or the fact that this generation of elite Kenyans came through the ranks with those who were doping to try to reach the top, and therefore are a lot more aware of other peers it than the elites would have been 5-10 years ago.
I think people often neglect thinking about the wider picture, context, and decision making that goes in to it. Nothing happens in a vacuum, and there's a reason Kenyan doping is on the rise. We can't just assume they've only just discovered it, but rather it's been building over time to the point we're at now.
So Canova may well have been right when he made this comments. There was no need for Elite Kenyans to dope 5-10 years ago. They were already the best in the world with all the resources to keep them there clean. Something has changed since though, clearly.