...ระวัง อย่าใช้ว่า “You are ‘sorry for’ something”...

That quote may be misquoted! ;-)

I hear a lot of "I am sorry for you." (meaning "I feel that you are 'pitiful' or 'in bad shape'..."). "I am sorry for your loss." is understood to have deep sympathy/emotion with 'you', more than "I am sorry about your loss."