All I want to do is make a simple spline IK. Apparently this is impossible because in order to construct one, I very expectedly have to move the curve handles. Moving the curve vertices automatically misaligns the handles so that they don't point towards each other to keep a straight line, even though they should.
I tried all kinds of selection to cursor and snapping techniques, none of which work because the lengths of the handles are no longer at their default value. How can I get blender to do what it is supposed to and construct a simple, straight segment of merely two handles pointed towards each other at their default length?