Your arguments carry weight in the sense that herd immunity may not be developed, evident in the case of HIV etc.
Though, you probably are not taking account of the arguments put forth in this video
1- Compare statistics of Sweden, the country which decided to not to go in a lockdown
2- The statistics are grossly misleading. As we still do not have exact statistics of how many people actually are carriers of covid-19, the percentage mortality looks higher. Though, this curve will be flatten as more and more people are diagnosed as active carriers.
3- At 30:00, this doctor has something really worthwhile to listen to, i.e. comorbidity aspect, which is grossly missed by a mile by these statisticians.
4- The technical issues with this lockdown strategy is just something a scientist would never believe in. I mean, people are allowed to go to superstores, which are huge attics with all that HVAC and all those crowds in there. Secondly, as we get our supplies from outside and use as the virus has the capability to survive on surfaces like plastic for three days. It seems virtually impossible not to get in contact with this pathogen.
5- As stated above, the lockdown is a failed technique to stop spread of this virus, rather the results of these lockdowns as witnessed in terms of economic and social aspects are far more drastic.
6- The data is further misleading for the people because of the unavailability of the comparative data for them. These doctors have reasonably argued that in US alone, each year, they have tens of thousands of deaths due to other similar diseases, like influenza.
So, rather than telling people that each day, 1,000 people are dying due to corona in US, we should also educate them that it is usual that around 7,700 deaths take place every day in non-corona related diseases and that, the total death toll each day, after this corona is not 8700/day. The total death rate has just shown a slight increase.