Some of the countries with the lowest homeownership rates [1] are also amongst the most financially secure on the planet. In Switzerland only 43% of households own their home and swiss households are, on average, way more secure than their american counterparts. [1]: https://en.wikipedia.org/wiki/List_of_countries_by_home_owne...
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…
Singapore is misleading, because 82% of the population actually lives in public housing (HDB). I suppose they're counted as "homeownership" because they are leased for 99 years [1], but that's a strong authoritative state with central planning and management of housing. Lease doesn't build that much equity because at you get closer to the term the value of the lease naturally declines. And you're not free to sell or buy to who you want.
[1]: https://en.wikipedia.org/wiki/Public_housing_in_Singapore