My family also owned a property next to a guy in Vietnam who owned a collection of 30 Ferraris.
To suggest Tokyo's flooding problem is anywhere close to Saigon is disingenuous.
I recall something similar happening the year before too.
My point being, you can cherry pick and see every city gets flooded. The difference with Saigon is flooding occurs throughout the city in critical areas. Government funds and projects exists to address these issues but the whole amount never gets allocated to properly developing the sewage infrastructure. Instead, hotfixes such as building the roads higher. This is a never ending back and forth with civilians building barriers or building their house higher so the water floods back into the streets. That's just one example of lack of infrastructure
Because I don't think anyone was arguing otherwise. The person you replied to merely said the poverty in Vietnam wasn't as bad as they expected. I'm not sure how you went from that to flooding.
I wish you luck drinking tap water or even the ice cubes at a street establishment in Vietnam
Edit: also, are you not proving my point? How can the people of a country be rich if the country itself is not? Unless there is great wealth disparity with most people living in impoverished conditions. I mean, if Vietnamese people were rich, they would have satiated their appetite for food, and other standard of living items, and eventually decide as a society that maybe they should fix the infrastructure problem that is wasting everyone’s time and even introducing risks of diseases / electrocution during these periods of flooding
Recap: The commentator you replied to said it's gotten better in the best decade (factually correct) and suggested it's considerably better than most Westerners think it is (an opinion/observation that also correlates with my experience, but YMMV).
From that comment, you brought up flooding in Saigon to which it was pointed out (to illustrate the absurdity of even bringing it up), that one of the richest cities in the world also has parts of it that flood.
You took that to mean they think Vietnam is wealthier than Japan (?) and that flooding is worse in Tokyo (?). No one said either of those things.
Look, you seem articulate and intelligent but no-one has even come close to saying what you keep suggesting. Please re-read the thread with a less combative mindset and realize we are all pretty much in agreement.
They wouldn't need those massive underground tanks to store stormwater as much if they had chosen a different approach.
When it comes to drainage, Vietnam didn’t take the learnings of Japan who had to learn first hand this “tech debt” of a concrete jungle. In fact, the solution in Vietnam is often layering on more layers of concrete, so water floods anywhere but the streets instead ( people’s home, who foundation is now 10 feet below ground). This is the lowest cost solution while offering the politicians a kickback, until people build their barricades high and flood the streets again.
Same thing can be said about parts of Tokyo during the typhoon season.