How’s there going to be a third wave with more than half the adult population vaccinated? And if there were why would it matter if it was a wave of mild/asymptotic cases?
We have half vaccinated half the adult population. A big chunk of those are older people who are less likely to be freely moving about.
The impact of a big increase in cases even if they don’t lead to hospitalisation or deaths has been well documented. Firstly there is the impact on the economy. Every case leads to quarantine of the infected individual and isolation of their contacts. For every one ill person, that’s another group of maybe half a dozen (or more) people unable to go to work for ten days. Taking that many people out of the working economy for ten days will have an impact. Then there are schools. We’ve been back a fortnight and three of our local schools have at least 1 class already isolating meaning kids education and parents’ work being affected. One school has closed completely.
You may think but why do we need to isolate people if it is just mild/asymptotic. Again, the perils of this are well known. The issue with long Covid is becoming clearer, people who will end up with debilitating health problems will cost workplaces and government money to support for however long.
More importantly, there are mutations. The virus is ever changing as viruses do. So far we’ve seen a number of variants which could potentially render the vaccine useless. The U.K. variant is thought to be responsible for 90% of cases now. If we had properly controlled things before, we probably wouldn’t have that variant and winter wouldn’t have been so out of control. So far the mutations have only affected how virulent the virus is. The next mutation might make it easier for children to be affected, or make it more drug resistant.
The familiar cry of “we’re going to have to live with this now it’s here” assumes we can just vaccinate people and carry on. That is not the case. We have to find a way to balance life with the risk and right now the risk is that if we aren’t cautious, we let it run rampant and it can undo the good work we’ve done to date. We have a choice to go slowly until every adult who can be is fully vaccinated, (or at least enough for herd immunity) and to see out the rest of the year with more restrictions, or go too quickly and find we are still doing this again and again in the coming years. Unfortunately too many people want the good stuff now without a thought for the consequences.