ok, but supply of PPE and ventilators to medical workers mainly concerns treatment rather than transmission.
stay-at-home and physical distancing primarily concern transmission.
we want to control transmission to reduce death and suffering, not eliminate them. even with dystopian and draconian measures (not to mention economy-destroying), reducing death and suffering to zero is effectively impossible (and seasonal recurrence is highly likely). moreover, the US is simply not designed, for good reason, to willingly tolerate such measures.
life is full of (similarly likely) risks, and we don't generally panic over them. if this were plague-levels of bad, more draconian measures might be warranted, but this isn't that.
sub-linear transmission is likely the best we can do.
with that in mind, physical distancing (combined with other carefully targeted guidelines like quarantining the sick and having workers wear masks) doesn't need to be perfect to be effective at reducing transmission to sub-linear levels. people who are likely to cough for any reason are already highly discouraged from going out, and most people in public are already hyper-aware of not coughing openly, especially not into each other's mouths.
stay-at-home doesn't meaningfully decrease the risk further, but it's a huge risk to social order.