This is really the key. Thailand might have some money and some flash malls, but it's really a poor third world country in most respects. These things happen very gradually, and to expect Thai people, who mostly still believe in ghosts, magic, spirits, luck, fate, etc., to behave like socially responsible people is quite an ask. Especially when an absolute cornerstone of Thai culture is to not hold people responsible for anything, not cause people to lose face, and not to really make a fuss about something.
It will probably happen eventually. But, as you say, the changes that come with it might not be to everyone's liking.