On that page they have Cmd + Esc mapped as the shortcut for the global system menu (see “Teleport”), and it looks like the CEO is a NeoVim user[0].
I guess they anticipate users hitting escape a lot. Making it a large target doesn’t strike me as a worse use of the space than dividing function keys into blocks of 4, and more likely to be intentional than an artefact of generative AI.