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> This is a novel virus - meaning noone initially has natural immunity to it.

This has then been proven to be an incorrect assumption, due to cross-reactivity with existing coronaviruses. While this does not prevent infection (or it is likely it does not), it may explain why some people did not experience symptoms, or very light symptoms.

>This is a novel virus - meaning noone initially has natural immunity to it.

Then why do the majority of people have minimal to no symptoms?

>social distancing, masks etc would still be necessary because our medical infrastructure cannot cope with getting all the cases at once

If this is the case, why hasn't the medical infrastructure in places without such measures, such as Sweden and recently Florida, been overwhelmed?

> Even if it was no more deadly than the regular flu (it's not - it's at least twice as bad)

This is not a useful statement. For young people it is significantly less dangerous than a severe seasonal flu.