Basically yes. If you try and put 3 or 4 teaspoons of pre-ground coffee in and pour over unfiltered boiling tap water straight from a kettle you're taking a massive, massive risk. Especially if you post about it on here. Have you got any idea how many people died in the period leading up to when domestic coffee grinders and scales accurate to 0.1g were widely available? It's literally the entire human population up to that point. In the billions. So I wouldn't risk it.
Basically yes. If you try and put 3 or 4 teaspoons of pre-ground coffee in and pour over unfiltered boiling tap water straight from a kettle you're taking a massive, massive risk. Especially if you post about it on here. Have you got any idea how many people died in the period leading up to when domestic coffee grinders and scales accurate to 0.1g were widely available? It's literally the entire human population up to that point. In the billions. So I wouldn't risk it.