I think none of us understand Thai customs, I think most Thais do also not understand Thai customs, the reason being there is such a huge class difference in Thailand and so many different customs for each class.
During my wedding feast, the ex-vice-prime minister made a toast at the hotel reception, and a photo of him, my wife, and I was in the Bangkok Post Society section, I think that is not standard, it had nothing at all to do with me, so I am not claiming anything, I am merely stating a point about Thailand and its class system. It is an observation.
People from Issan like to eat fried crickets etc, I asked a brother-in-law who was born and schooled in Bangkok if he ate them and he said no chance, I would not eat such food, I am not from upcountry.
They had chauffeurs, servants, the lot, wealthy, and looked down on the more uneducated Thais, that made no difference to me as my wife and I were already living in the UK and we were only in Thailand for our wedding so what they did in Thailand had no bearing on our lives in England.
A friend was talking to me a couple of years ago and he mentioned how his Thai wife crouched down on her heels down to the floor and ate, he said you know, in the manner Thais eat, I told him I have never seen any Thais eat that way, they use a spoon/knife/fork and table and chairs just like we farangs do.
I found out she came from a small village in Isaan, with so many different standards and ways of life in Thailand, one group never mixes with the other.
In my experience most farangs I have come across mix only with the poor Thais and for some reason most of the women are from Isaan.
Any farang who claims to know about Thailand and its culture is kidding themselves, they also generally mix with the same group or class and so do have many years of experience as they claim but in one level of Thailand, the level they are living at.
I have been living in Thailand for two years now although I am visiting the UK for a month at the moment.
You mentioned money and my lack of understanding of it, I don't need to know about Thai money whatever that means in this context, I send bank transfers to my Thai bank account when I need to, and my wealth, and property are all safe in the UK in my name and under my control.
We never know when temporary year-by-year visitors like us on yearly visa extensions might have to run for the hills (well in our case the airport) so keeping the majority of what we own in a safe country is the only sensible thing to do.
Although it must be very tempting to marry a poor Thai woman, buy her a car and a house, pay for her parents and the sick buffalo as a lot of dim farangs do, and then think it is the norm, a while later they find it has all been taken, they do make me laugh though, they are so gullible. 🤪
I don't think I would like to live in a typical Thai village as many farangs seem to do (or maybe that is what they can afford), it would be so boring, I prefer Phuket which is international and has international standards (but I do avoid the tourist areas), I can't see what people like about living in the back of beyond in a poor Thai village, why not go one step further and live in a cave.