My sons have been helping their grandfather with any number of projects on this trip. Today they were blacksmithing a custom stand for a pottery birdbath.
Pottery is rarely regular enough for a tape measure to suffice- instead you need to make several measurements, try something, and make adjustments. So the calipers help. So does flexibility and constantly checking in.
Very little of our lives is "One size fits all." Finding the proper fit, whether it's a hat or a relationship, takes effort and there are most often whoopses and corrections along the way.