Then every vote will count. That's pushing the argument to the edge of absurdity. It's clearly an impossibility.
We have a system here, and some candidates are going to win and some are going to lose. That's going to happen. Some quotas under PR systems will go unused. We can have higher tiers and higher tiers, and I suppose we could exhaust them, but then we'd get a very complicated system.
There are always going to be trade-offs. As far as I know, that's just a general condition in life.