Why do Glyph uses draw their characters like this?

[nuecodesigner]

I apologize to the Glyphs and Typography community for my rather ignorant question. I am still learning not only the interface of Glyphs itself but type design in general.

I often see characters drawn either in tutorials or in screenshots of the Glyphs UI when fellow users share their work in progress. I can’t help but feel like I am missing some sort of fundamental lesson as to why I see characters being drawn this way. With their paths sort of perfectly criss-crossing one another and remaining a single path rather than multiple pieces or paths.

Would anyone be able to explain why this is?

Thank you again. I love Glyphs and am excited to keep learning more.

[Dezcom]

This is done so you can adjust the stroke width easier without resetting the stroke parallel or join point over and over

[nuecodesigner]

Ah yes that makes sense! Thank you!