That seems like a slight exaggeration to me. The linked Reddit poster put the word "cuts" in quotation marks, indicating illustrative use of the word. Most likely they meant harmless (but uncomfortable) pressure indentations from resting their forearms against the edges for a while. It does not seem likely that they meant the edges of their laptop drew blood (which is what you seem to be suggesting).
They make decent laptops, but with incredibly sharp, non-rounded edges, which have actually cut* some user's palms.
https://www.reddit.com/r/GamingLaptops/comments/iioylp/just_...
edit:
* Yes I exaggerate here, but it is annoyingly sharp