Yeah, subsidized mortgages (via government insurance and mortgage interest deductibility) tilt the market towards home ownership in most of the USA.
Most of the rest of the world doesn't intervene in its housing market as much and the ROI on owning vs renting can shift. Switzerland will tax your home on the potential rental income of your home, whether you rent it out or not (I think this recently changed, though). The home ownership rate is historically between 30-40%. Basically farmers and the upper quartile of income earners are the majority of owners. The result is that most Swiss have their wealth in more liquid assets and are also highly mobile for work.
> Will this blow up at some point? Meh, maybe?
Owning is also turning into a problem for many Americans. Some people are trapped in their homes because moving means resetting locked in low interest rates. Insurance has made home ownership extremely expensive in much of the states that were fastest growing over the past decade. I'm sure solutions (good and bad) will come, but sometimes it's nice to just be able to hand in notice and walk away.