It is difficult for parents to raise their kid differently from how they were raised. The family you (OP) mentioned is an example of this. If I constantly eat a lot I will automatically feed my kid a lot. If I'm a chain smoker I don't give a shit if my kid inhales the fumes, so my kid will end up smoking too most likely. This is also, ultimately, with beliefs. If I'm a devout christian, my kid will most likely become christian too, without him/her actually having a choice.
I'm not saying that it is right of course, but it is normal that the parents' habits will be passed onto their kid. Thus, in this case, resulting into horrible health conditions from such a young age.
I'm not saying that it is right of course, but it is normal that the parents' habits will be passed onto their kid. Thus, in this case, resulting into horrible health conditions from such a young age.