There's no way to get the R0 of Delta below 1.0. Period. Even the strictest lockdown regiments have had transmission far above 1.0. The only reason Delta ever subsides (like in India) is when it burns through enough of the population to lose fresh targets.
The science is settled. Virtually everyone is going to get Delta either sooner or later. There's nothing that can be done to change that fact. All we can do is slow the spread from a few weeks of wildfire to a few months of wildfire.
> There's no way to get the R0 of Delta below 1.0
Good grief, stop. Stop using jargon you don't understand. Stop making medical pronouncements that are clearly wrong. STOP. That statement, if true, would mean that the entire population would be trapped in a cycle of reinfection after reinfection, coming faster and faster, forever. It is clearly not true. No disease works like that. You are using words you don't understand to describe a subject you don't understand but have strong feelings about.
> The science is settled.
Then maybe you could cite some?
In fact objectively India's net response to Delta, both in width of infection wave and peak outbreak rate, has been better that the US's, despite near zero net vaccination.
And why is the US so bad at this? Largely because of PEOPLE LIKE YOU who insist on crazy pseudoscience theories like "Masks don't work" or "treat it with dewormer" or (sigh) "Pandemic controls are already doomed to failure" instead of just doing the right thing. Stop it. Stop trying to be smarter than everyone. Just get in line and do the right thing.