Ok, so it's a "feature" then. But perhaps it would be a good feature to consider what I suggested above. If we can someday craft special tools to bend objects then it would take some extra data points to describe that bend.
Maybe when plumbing is implemented or bending wood beams to create arches this could be useful. Here is a typical hand-operated pipe bender which is useful for routing pipes while a house is being built. Ofcourse larger industrial versions of these exist
https://www.amazon.com/Manual-…Pipe-Bender/dp/B001Z0U5HM
And for bending wood, basically the same concept but different method. A simple way is to have a shape cut out from a wood beam that represents the arc you want to achieve. This is used as a press and steam is applied to slowly achieve the shape you want:

Many other methods exist. Here's another idea of using weights instead of a press. This could be used for making custom boat hulls

Again, if additional data points are used to represent these bends then we'll see some rather amazing new builds. Also, as you've shown plenty of concern about, supporting bends would greatly reduce the number of objects we have to create in order to "simulate" the look of an arch. Perhaps we can also use the extra data point(s) to describe twisted beams such as this:

Perhaps a new wood crafting station for achieveing arches and twists would work. The current sawbench appears to be just for cutting wood.