It is not a routine flu so no.
That is a counter factual that is not shown through ANY data and considering this has stuck the entire planet, that data would clearly exist.
There certainly were FAR less sever methods like were used in Sweden. Those may or may not turn out to have been a good idea but the one thing we know for sure is that it would not simply have 'gone away.'
Wrong.
Since it is no more contagious than flu, with same R(0)=2, then it has to go away from herd immunity the same.
The way herd immunity works is that if the initial spike it high enough, the virus greedy enough, it burns up the easy hosts, runs out, and dies out.
It has to switch hosts every 12 days.
But if you "flatten the curve", then you prevent the spike from burning up all the easy hosts, you essentially conserve hosts, so then you prevent herd immunity, and make the epidemic last FOREVER!
We do know for sure that all epidemics with such a low R(0) value DO simply "go away".
And they normally ALWAYS just "go away".
The ONLY exception is the last time we tried to "flatten the curve" in 1918, with Spanish flu, and we made that last for more than 2 years.
So we should know better by now to NOT "flatten the curve".
That prevents herd immunity and greatly stretches out how long the epidemic lasts.
And if you do not believe me, then look at where it is being the least problem, which is Africa, where they are doing the least "social distancing", vaccines, etc.
If you then wonder why Fauci claimed we could not go with herd immunity because it would cause 2.4 million deaths, the mistake is for 2 main reasons.
One is that he was getting incorrectly high lethality estimates because only those near death were going to hospitals and being counted as infected.
The only is that he missed that there is a 400 times greater risk of death if over 70 in age, compared with those under 40.
So you have to at least divide Fauci's herd immunity death estimate by 400 because you would only ask for infection volunteers under 40.
Dividing 2.4 million by 400 gives you only 6,000 deaths. It also would be even less due to actually lethality being lower and herd immunity needing a much smaller number if achieved more quickly, before there is as much spread,