You are wrong, Thai people are not fascinated by dead bodies, it is Westerners that have a weird kind of phobia or rule that they are not to be seen. When moving to a new country, it's polite to adapt to the local beliefs and traditions, not criticise it as it is not what you are used to. In the words of a Christian saint -
O divine Master, grant that I may not so much seekto be consoled as to console,to be understood as to understand,to be loved as to love.For it is in giving that we receive,it is in pardoning that we are pardoned,and it is in dying that we are born to eternal life.