I am from California, but I live in Vietnam now for nearly two years. Riding a motorbike here is almost a necessary part of the culture. I've also been to Bali, which has a similar, but not as extreme culture.
Unless you have prior expert experience on two wheels (I raced bicycles for 8 years and have ridden motorcycles on all terrains, for 10), or you are just really talented, the last thing you should do is get on two wheels in countries like these. You'll get injured or killed at some point.
I have World Nomads insurance and I really hope to not have to use it, ever.
And majority of expats get by fine without motorcycle racing experience, the biggest issue is as always driving while drunk.
In the US, you are literally a target. Road rage is a thing. Someone turning left or right on you happens all the time. In Vietnam, cars turn really slowly and usually in a predictable manner.
Now, the issue is that when things go wrong, they go really wrong. Vietnam has one of the highest rates of road deaths in the world [1] [2]. I think these numbers are actually low, because not all deaths even get reported. Also, not everyone dies... non-fatal accidents happen constantly here.
The other issue is that this is a relatively young country for people behind the wheel of a car. Cars have only been widely accessible here for the last ~10 years and it is growing. The level of skill for drivers is extremely low, the education testing is a joke. There is constantly videos of people driving their car/bus/truck through a group of people, house or off the road because they mistake the gas for the brake. Or even worse... side effect accidents... [3]
[1] https://e.vnexpress.net/news/news/traffic-accidents-kill-ove...
[2] https://tuoitrenews.vn/news/society/20180220/179-killed-in-t...
[3] https://www.facebook.com/vieclamtaixelaixe/videos/1972940609...
Singapore is not THAT expensive. Yes, it's first-rate, but not even close to highest COL[1]
[1] https://www.numbeo.com/cost-of-living/compare_cities.jsp?cou...
Singapore is a "top 10" city by any metric and that was the main point.
https://www.forbes.com/sites/niallmccarthy/2018/03/19/the-ci... https://www.economist.com/graphic-detail/2017/03/21/measurin... https://www.thrillist.com/news/nation/most-expensive-cities-...