To be fair, if you know the rate of contagion, recovery, and death *for sure*, then mathematically, you can predict the time when the majority of the population has immunity from having recovered (or removed from the population due to death). Then, based on 'herd immunity', you know when new cases will no longer overwhelm health facilities.
Now, you'll still need some isolation of the high-risk groups and continued good hygiene to protect them.
Models, for now, are putting mid to late April as the peak. May 1 is the time when things will noticeably be on the decline. A whole month later on June 1... that seem reasonable for starting to get back to normal.
Throw in finally having test kits for the disease and tests for having antigens (had the disease, recovered, now immune)... things start looking even better.