Sure, but it's likely that this won't be going away. So as soon as you relax lockdown, it may well come back. Unless there's a vaccine, which I'm not betting on. And then there's the chance of another zoonotic virus in a few years. Time will tell, but it may turn out that isolating vulnerable populations is the best long-term strategy.
You’re right that it’s a marathon not a race. But isolating the vulnerable (on a semi permenant Basis) is not easy or good for these people. With good testing infrastructure and contact tracing, we can minimise harm. We just have absolutely no definite idea who are those who are otherwise healthy who are going to end up hospitalised (say for my age group 30-40 males it currently looks like 1:500 will end up needing hospital support) and that’s even before you look at those who may do fine without hospital but still be carrying some serious consequences (ie original poster’s partner).
I for one would like to avoid getting this altogether
Maybe more than marathon. I mean, the influenza strain that caused the 1918 pandemic is still circulating. Notwithstanding herd immunity through vaccination.