This is a good question, and I think the answer lies in history. "Do not verb" wasn't always the way things were said. Here's a chart:

The use of periphrastic do in Early Modern English
negative declaratives: evidence from the Helsinki Corpus
The "not+V" form was not as popular as the "V+not" form in eModE, but it was a valid way to say things. The form "Do+not+V" came into being after do became used in questions ("Have you any?" vs. "Do you have any?"). "Do+not+V" won out for several reasons:
- English was switching over from SOV to SVO
- It was similar to the existing "Aux+not+V"
- It makes the distinction between object negation and sentence negation clear
- Example of object negation:
But she spoke not of a lover only, but of a prince dear to him to whom she spoke
Cited in the aforementioned paper (E3, CEFICT3B, FICTION,
SAMPLE 1).
I also wrote this answer about the Earliest attestation of “does/do/did not + verb”. The information and sources there are also relevant.