Insurance is one of those expensive items when living in Thailand.
Many expats do not even have insurance.
Then you roll the dice that one accident can financially wipe you out and get you deported if you cannot pay the hospital bill.
Living in Thailand is no different than your home country.
Did you have insurance at home? Of course your did.
If you cannot afford insurance in Thailand, you probably should not be living here.
Road accidents can happen in a split second in every city and town.
Thailand is still the third world and accidents happen every single day.