"It doesn’t make sense for chocolate bars to be divided into equal-sized chunks when there is so much inequality in the chocolate industry! The unequally-sized chunks of our 6.35 oz bars are a palatable way of reminding Choco Fans and Serious Friends that the profits in the chocolate industry are unequally divided.
And in case you haven’t noticed, the bottom of our bars depicts the West African coastline. The chunks just above it represent the Gulf of Guinea. From left to right, you have Côte d’Ivoire, Ghana, Togo and Benin (terribly politically incorrect, we know, but we had to combine them to create enough space for a hazelnut), Nigeria and part of Cameroon."
I have never been in or adjacent to a situation where I had to measure chocolate packaged and sold to be eaten as-is in a recipe by squares broken off of a bar, at the demarcations pre-scored into the bar. If I needed that much control I’d grate it or use a chocolate that came pre-granulated, like baking kisses.
For chocolate bars meant to be eaten, the score lines are very much for sharability first. Any use of them for culinary measurement is at best a peripheral feature.
This probably doesn’t hold true for baking chocolate. But Tony’s isn’t baking chocolate.