I'm afraid the author has it backwards. This style of writing didn't start as a font from some company.
This is just how you used to be taught to do lettering in a drafting class. The straight lines and simple shapes make it easy to do lettering with pencil or a pen, which is also why all the lines are the same width and all the line caps are rounded.
Later on these turned into stencils, which let users do lettering quickly by tracing the pen inside the stencil - and then turned into fonts for use in print. But all that came later. What we have here is just lettering people learned in drafting classes, and which was later used to make stencils and templates.
This is just how you used to be taught to do lettering in a drafting class. The straight lines and simple shapes make it easy to do lettering with pencil or a pen, which is also why all the lines are the same width and all the line caps are rounded.
Later on these turned into stencils, which let users do lettering quickly by tracing the pen inside the stencil - and then turned into fonts for use in print. But all that came later. What we have here is just lettering people learned in drafting classes, and which was later used to make stencils and templates.