Boiler, I agree with most with what you said in last post with the exemption of this:

"those whose immune systems have seen it before (due to vaccination OR previous infection) will have a mild disease for a few days"

That's not what the current studies are showing; that is why they want you to get boosted ad infinitum. Your jabbed immune system is compromised as it is now performing work on a singularity of the virus and lacks the long term resistance to the virus that a previous infection provides you. Natural immunity has always been the best immunity available when dealing with corona derivatives.