It demonstrates that you don't actually believe onion links are viable.

GP said:

>you shed a layer of security by deciding to make your address public, non of which would benefit the whole point

It's possible to host something with no intention of making it internet-public. I also have services like that, that I only use myself or with friends. GP argument is that they don't want to share the onion link to their website, because (bluntly) we are not invited. Onion domains are actually relatively private (i mean unguessable - unlike clearnet domains), so it's possible to host private websites without any additional authorization.

Having said that, onion links carry a implicit baggage, so while I think they're great for sharing things with (technical) friends or a private VPN, they're probably not the best way to host services intended for public.