Very few regions have had anything close to overwhelmed hospitals. More regions have had to lay off hospital staff than have been overwhelmed. Some like UW medicine now face a $500 million budget shortfall due to the ban on elective procedures.
Social distancing measures may have an effect on r_t as low as 0.1 per analysis by Nate Silver. Others show a negative or no correlation between government lockdowns and reduction of r_t.
It is fair to question if these lockdowns - as instituted - have done anything.