Im trying to make some curves using a [Miscellaneous → Curve] Blueprint. But Im kind of confused as to why the graph is not uniform?

For [Time] axis, the graph horizontally shows two rectangles between 0 and 1.

For [Value] axis, the graph vertically shows 20 (?!?) rectangles between 0 and 1.

This causes a very deformed graph in which the 1/4 of a circle curve Im trying to make from [0,0] to [1,1] does not look even remotely like 1/4 of a circle.

Is the non-uniformity of the graph just visual, will it read correctly when used?

Is there a setting somewhere, that determines how the graph is displayed?

Why is this distortion default?