Having spent a lot of time over the last months writing both refined, structured, and grammatically perfect prompts, as well as exact equivalents of the ones you quoted (modulo subject of the prompt), I have three observations:

1. I'm glad the second kind works too;

2. First kind is where I find my overall throughput to be literally constrained by my typing speed;

3. Most importantly: those prompts you quote aren't just "half-assed" like sibling comment states; they're different. The style of writing, and the typos, capture emotional valence. It's a signal.

Again, I too produce such prompts - including the exact same typos - when under pressure and irritated by the direction the model is taking.