Because of this high dispersion rate, it may make sense to earmark a certain amount of vaccine doses for people who are not themselves at risk of complications when contracting Covid, but who are at risk of becoming a superspreader.
(Disclaimer: I'm not an epidemiologist.)
At least then we stand a chance of getting the economy back on its feet.
For instance, I'm a vulnerable person because of preexisting conditions, so I'll likely be offered a vaccine relatively soon after approval. But that won't have a large impact on economic recovery: I'm in the home office in a single-person household and don't have any care obligations, so I'm at a comparatively low risk anyway. And I won't change my current behavior until the disease is fully gone anyway.
Not to mention that we already know about long term side effects that have nothing to do with a specific age group, and that there's a chance of re-infection.
If we just vaccinated 65+ year olds, we'd cut deaths by 80X%, where X is the effectivelness of the vaccine. Even if the vaccine was only 80% effective, that's still 65% reduction.
Add in people with dangerous conditions, heart conditions, cancer, morbidly obese, etc., and you could probably knock it down further.
And as the percent of the population with immunity rises, the spread will slow quite a bit.
We don't need heard immunity to open back up.
You don't need to eradicate the virus, just stop it affecting the most vulnerable. Everybody else can then carry on as normal (albeit with a slight chance of getting a nasty flu-like illness).