That’s a good thing for security, but as @Tuxicoman said the way to change it should be indicated in the doc.
Because it’s important to know the default behaviour (some people might want to finish the install via SSH and will be blocked) and how to change it.
Yes, we should definitely add it in the doc (feel free to open a pull request for that).
I just want to add that the recommended way to install is using the Yunohost image, given that starting from Raspian is tricky (because ssh is not enabled by default, and so on). We might want to add a “recommended” next to the title to clarify that as well.