Also, we haven't been treating the disease yet. We have gotten better at managing/alleviating the symptoms and relying on the body's own immune system to clear the infection. If this discovery allows for a more targeted treatment of the infection itself rather than its symptoms, it's actually very good news. But even then, it's going to take months before we can validate the efficacy of such a treatment.
Not the OP but the expectations were that in 6 months' time we would have gotten better at treating at least "some" of the disease. No-one knowledgeable enough expected a vaccine by this autumn but some people were hoping for a greatly increased standard of covid care in August 2020 compared to February 2020.
Re: the vaccine thing, I don't think that's logistically possible to give the vaccine to billions of people in less than a year (even a 50% covid vaccination rate for our species would mean administering 3.5-4 billion vaccines), so 2022 at the earliest looks like our best bet (hoping that we'd actually have the vaccine by early 2021). Looking at past vaccination campaigns I personally think that even a 3-5 year timeframe looks optimistic, but that's just me.