Isn't just like flu? You feel extremely unwell with a chest cough and sore throat but most healthy people just ride through it? Those that are vulnerable; elderly, those with low immunity etc should be concerned and need to be protected but the rest of us, we just ride through it, no?
Is worse than flu - double the death rate even for younger people. And recovery can take weeks, with pneumonia even for a lot of the 'mild/moderate' cases.
But even without that it will affect everyone. Ill people (not all old or vulnerable) who need treatment will all be trying to get it, even if they've not much chance of getting it once enough people are ill at once. Hospitals will be clogged up, nothing like enough beds, the govt have said 20% of the workforce (including nhs and other essential workers) could be off sick at once. People (ok, maybe not you, lucky you) will end up dying at home. The economy will take a massive hit. This isn't wild speculation, it's a likely outcome if the infection rate soars like it did in Wuhan.
Even people who feel confident about surviving the illness itself are going to be very badly affected if we can't make a massive collective effort to slow this right down. But if we can do that, it could make a huge difference.