I'm not sure about Thailand so I'm not commenting on this, but in my home country, for instance, it's continuous not cumulative. But in many other countries is either continuous or cumulative.
I'm not trying to game the system, I just don't remit money because I don't need to. I work for a company from my country, they pay me in my country. Why would I send any money to Thailand? Said so, even if all remittances were tax free, I still wouldn't be doing any remittance, because I can pay everything with the cards, bank accounts and apps from my home country. It's only you who ridicule yourself by exposing your inability to understand that there are different ways to live, especially in this modern age, and different banks and apps from other countries that work in Thailand in ways you obviously can't even imagine 🤷🏻
all monies brought can be subject to tax, correct. But there's people, like me, who DON'T bring any money. Card payments aren't remittances, unless you or anybody else can show me an official text, from the Thai government (not this blog, or that YouTube channel guy) written either in English or Thai stating otherwise.
180 days just makes you tax resident, but it doesn't always mean you have tax liability. If you don't make money from Thailand and you haven't done remittances, you might not have any taxes to pay.