Think it’s reasonable to assess people want to keep their money where they choose, not trusting Thai banks is not the issue, it’s that they pay no interest for it! That’s why I’ve kept a non OA as long as I can. Compared, I’ve made a profit.
But in fairness Thailand also seems to make it more difficult to get your money back out if it’s needed elsewhere or urgently.
I can only speak to the US. Deposited funds in federally insured banks are safe up to $100k per person. FDIC has been around a long time now