Obviously this isn't the strongest argument in the world, but, if the whole field is so bullshit why has anyone bothered putting effort into post-quantum encryption? What's the point if quantum computers will never materialize?
BTW, the term post-quantum encryption is delicious because we had never had the quantum encryption era. Like the post-high speed era rail in the US ;)
So you can talk ante-quantum and post-quantum in this sense, but it makes little sense to talk about just 'quantum', in exactly the same way that we schedule a lot of things AM and PM but very little for precisely noon.