Because I did not know about the option I just found, and tried to achieve it manually for DAYS now:
The colinear continuity option.
God DAMN!
Why isn’t that enabled by default?
The only reason I found it was that I enabled the patch precision drawing of curves within a surface, and evaluated their continuity and discovered that they were really breaking, despite the surface coming up as green, and even the shading lining up (although with bumps which I could see in the CV mesh, but didn’t know now to straighten out without turning to manual tweaking… and hence me dabbling with various align options which enabled me to retain some of my tweaking).
The levels of complexity to be discovered behind every option in this software is just mindboggling.