I believe that nobody really expects to meet the gap between actual capacity and "required" capacity, i.e. that it can't and won't get met - nonetheless, raising the capacity to save lives will save more lives; even if it's not sufficient.

It's worth noting that every early "flatten the curve" illustration example that I saw had the lower curve still above the capacity, just not nearly as much, however by the time it reached mass media, it had somehow morphed to the lower curve at or below capacity... probably because they thought it sells the idea better? but at the cost of misleading the public about what's feasible.