I think you are right to be suspicious of social media OP, you obviously frequent parts of it where absolute crap is spouted. You need different sources.
First you know there must be something very different about this if all over the world govts are doing things they desperately do not want to have to do. So admit to yourself now that you are not and cannot be trying to show these things are not needed. You are only trying to understand why. After this I think you should sit down and ask yourself why you are so behind in this.
Some viruses like Ebola have a very high mortality rate amongst those they infect. Others have a lower rate. The overall number who die depends on the combination of that rate with the infectiousness level of the illness. A leading expert has said this is much more frightening than Ebola because it is so much more easily passed on, so much harder to avoid catching it. So if many more people catch Covid 19 than catch Ebola, more people will die even though it has a lower mortality rate. For example, if an illness has a 90 percent mortality rate but only ten people get it as it is harder to transmit, then 9 people die. If an illness has a ten percent mortality rate but is so contagious that 1000 people get it, 100 people die.
This is very contagious and as PP have said, no one has immunity and we have no vaccine. It will infect many more than are infected in a flue season, and it has a much higher mortality rate.
Left unchecked it would rage through society, there would be massive death and a complete breakdown of health care. Within just weeks I think you would be tripping over bodies in the street outside hospital, until people just gave up and died at home. The mortality rate without any health care is not even known. Those not killed by the disease would be at risk from the complete lack of any other health care.
Social order would break down and the economy would entirely collapse.
You haven't seen quite this elsewhere because nowhere has been stupid enough to take no measures at all. But it is early days, who knows what is to come.
I would have thought what you can see of what is happening elsewhere is bad enought for you.
I don't mean this in a patronising or rude way, I am genuinely saying.... You can do better. Really ask yourself if your problem is attitude, intelligence, education, habits...and see what you can do to change that.