You might be right about dividing the numbers by 2 is not enough; different studies on the subject show very different results. Some studies suggest there are not that many unreported cases in western countries, others argue that only 1 out of 5 cases get reported (1 out of 3 for US in that study). So dividing by 3 or 4 might be as likely, but dividing by 10 is not supported by what we know so far.
A question: how do those 30+ you know that had it know they had it if they didn't get tested?
Not saying all countries should remain in lockdown for the next three years. But local lockdowns, or temporary lockdowns might be necessary again. Mass events probably are not a good idea for a while. And many smaller measures will be necessary for a while as well (masks, social distancing, screens, ...).
Basically what most countries are doing: monitoring on a daily basis and relieving measures when possible/re-introducing measures when necessary.
Look at Sweden, if it wasn't for the Media scaring everyone, we could of just protected the old / ill, in the UK, not lockdown get it spread asap with few deaths as it's only killed 1000 ( 800 with health issues, 200 without ), be over soon and old / ill could be back out enjoying what's left of there lives pretty soon.
UK, the lockdowns where 2 - 3 weeks too late for the old / ill, intentionally I think, by the time the lockdowns had came they'd already had it.
Shielding stopping soon, so it'll get around those that have avoided it.
The millions of unemployeed, ruined business and we've got kids terrified there going to die when they really aren't at all, mentally screwed up for life, super snowflakes
