He’s just being intentionally obtuse, not worth engaging with that type of commenter.
I know it’s a bit of a trope, but HN has really declined. Lots of topics just have no valuable discussion here anymore and unfortunately anything Elon Musk related is one of them (anything cryptocurrency related is another).
The "link" is one or "the" feature that makes the whole thing work. And it is not meant to be restictive. You link to whereever you want. That was the idea of the WWW (tim bernes lee).
No restrictions at all in the base of the protocol. The opposite is true: everythink is and has to be inter-linkable.
I have no idea what this means.