What about it? To attempt to restate it: due to the emergence of the delta mutation, it is becoming less reliable to rely on the shared benefit of others being vaccinated to protect unvaccinated or immunocompromised individuals. So the risks to all populations is increasing, but not proportionally: the speed of spread to those without the personal benefit of being vaccinated is increasing much faster.

Edit: note, I’ve seen your other link, and do wonder why that was observed for that community. Here I am referring to current CDC estimates for the country and reports of hospital utilization averages overall.