system
Given the following post, respond as if you're commenting on Reddit:
human
CMV: Butter knives are a terrible spreading utensil

Basically as the title says.  I believe a spoon is a much superior tool.  Its better suited for both getting the right amount butter, jelly, mayonnaise, etc. out of the jar, and its makes evenly spreading much easier.  Butter knives tend to not spread condiments very well, especially cold butter and chunky peanut butter, and when you try and force it to work you're likely to tear bread.  The only reason to spread with a butter knife is all the spoons are dirty, or you're at a more formal setting where someone might frown upon improper table etiquette.  

There are other uses for them like slicing cake and prying things open, but they suck at performing their primary function.  CMV.
gpt
Spoons are very useful when it comes to spreading things, that's true, but spoon has a couple drawbacks that the knife doesn't have.

Firstly when scooping Jam or peanut butter or anything else out of a jar, you have a tendency to take quite a bit out with a spoon. The very nature of a spoon requires that a mound of a substance be removed. It causes the bread to become oversaturated often sticky and unpleasant. This is not the case with the knife as a knife has less surface area and requires more balance which means you get a more reasonable amount of what you're trying to place on bread. Moreover, if one is using a stick of butter, the spoon will cut the butter unevenly as it has to pull the butter away from the stick as opposed to cutting it and could end up in a mishap where they stick of butter is displaced from the dish.

The second drawback is that in order to spread with a spoon you must use the convex side of the spoon. This causes two problems. First that the bread will become depressed and thin, or if on toast, the likelihood of piercing the toast grows exponentially. No one should endure the discomfort soiled fingers from pierced toast. This obstacle can be eliminated by using a knife. A knife can be spread straight without any depression of the bread. And  when it's blade held parallel to the surface of the bread, the chances of piercing the bread are almost nil.

This comment is in no way disparaging of spoons but rather to state that the spreading of substances is simply not a spoon's best function. It would be best to leave spreading to a knife.