I agree with freddie_mecury I am not sure I see the argument or what you mean by "financially secure". But if I can guess at your point I would say that if "financially secure" means having cash then it would make sense that higher percentage renter countries would be that.
Another point I'd like to add is the US isn't far from Switzerland on that list. Also Singapore being in the #2 spot with 90% home ownership, but in my opinion Singapore is considered a wealthy country[1] with a GDP close to the US.
And lastly I will say that the sample size on is limited to about 25% of countries in the world, though there are most of the developed ones.