I think that once you have moved from isolated cases to clusters to community spread to exponential growth, 'lockdown' is too late and what is required is actually quarantine.
Even a world beating test, track system would fail in circumstances of exponential growth.
When you know that exponential growth is more or less guaranteed, you have to lockdown early and effectively.
Lockdown is most effective with preparation of the terrain (making sure your personal immune system is working at its best), protecting the vulnerable, ensuring sufficient supply of the essentials including PPE, planning how to deliver education outside of formal learning, planning how to WFH. Individuals, communities and governments have a big role to play in making this a viable possibility.
This is not about billionaires increasing their wealth at the expense of the sacrifices of others but pandemics, just like wars, are profit makers in a capitalist framework.
I know that people are saying they understand exponential growth theoretically but I bet they are still surprised when they slip on icy ground and hit the ground with a force sufficient to break bones or at least severely wind.
Get cases low enough for test and trace to work, including the asymptomatic.
We don't yet know what the true case fatality rate is but we do know that Covid is very infectious and so even a small rate can have a serious effect on morbidity and mortality for those directly and indirectly impacted.
We can't comfort ourselves that the indirectly affected are only an issue due to government incompetence in being excessively proactive/inadequately reactive.