would have been

"It would be nice to go to Australia this winter, but there’s no way we can do it."

It's possible to say "It would have been nice to go...", if you had had plans to go, but have had to cancel them.

Is this also not OK? If not, why?

A: I can't come to the party next week.
B: Oh, that's a pity. It would have been nice to see you.

Isn't "it would be nice to go to Australia" looking at it from the moment of the party and "it would have been nice to go to Australia" looking at it from the past until the moment of speaking? The implication in the latter seems to be "if, up to this moment of discovering we cannot go to Australia, I had had to imagine what going to Australia this coming summer would be like, I would have imagine

Sorry, here's the edit of my last post:

It's not that it wasn't nice, it is that it was nothing. Something that does not occur can be neither nice nor otherwise. Also, isn't "it would be nice to go to Australia" looking at it from the moment of the being in Australia and "it would have been nice to go to Australia" looking at it from the past until the moment of speaking? The implication