Currently, if you forget to include the transfer protocol, it assumes you mean a relative link:
This is not intuitive UX, especially for non-technical bloggers.
It’s particularly unintuitive because page names are not memorable enough to write links in generally. I mean MAYBE someone would through in an (about) perhaps.
The only way I can see prioritising internal links is if you build another feature: make it easier to link to previous posts, e.g. by allowing copy & paste previous Posts to obtain the relative link.