Why is it that animals all eat raw meat but human's have to eat cooked?

So I mean there are exceptions to this... but all animals just eat completely raw meat where as us. There are some meats you can eat raw but there is a high risk of getting sick especially if it isn't prepared in extremely hygenic and sanitary conditions. Like sushi and such. So I'm just wondering, is this something we used to be able to eat but have lost immunity to eating raw meat now it makes us sick. Does anyone know the answer or have any ideas about this.?.