I know that math can be challenging for some, but I'll try to help you through this. Say we follow the Kundert Methodology. Intentionally get 100M people in the US sick in over 2-3 weeks. Of those, approximately 15% are requiring hospital care. 15M people. Guess how many hospital beds we have in the US? According to the American Hospital Association, we have roughly 900k beds. So 14.1M patients aren't treated. Not good. Leads to complications, and a higher fatality rate. Additionally, 5% of those infected require ICU. That's 5M patients. We don't have the capacity to handle 10% of those cases. Because we've crashed our medical system, 4.5M Americans just died.
So at the end of the day we have the following:
4.5M dead.
500k with long term health issues
And this ignores the fact that we wouldn't be able to keep at risk "and any scared people" in a safe isolation. Inevitably, a decent percentage of them would get infected and have worse results.