(note: while WSWS (trot site) uses CCP instead of CPC, they generally have good takes on China and support China against US imperialism)
(note: to clarify, this article is in support of Zero-COVID and sees the lifting of the policy as a grave mistake)
(note: i do not necessarily support all the shit wsws says i am not a fucking trot)
There's some logic to states just trying to power through the annual COVID+flu season with the increased incidence of symptomatic RSV. Unfortunately this was always inevitable once SARS-COV-2 wasn't contained immediately and countries tried half-assed "rolling lockdowns" in totally uncoordinated and ineffectual manners. I think most immunologists would have expected this? I'm only in a tangentially related field and I figured the cold & flu season closest to COVID restrictions ending in different places would be worse than the initial and more recent COVID waves, Delta excluded. People around other people are constantly exposed to relatively harmless pathogens, and occasionally to pathogens their immune system doesn't already know or which are significantly different from the versions they encountered but still close enough to trigger that outdated memory to try to fight it. That constant exposure has been pretty consistent throughout human history, eg telecommunications and mass extended quarantine/isolation is pretty rare historically.
Eventually a lot of people were going to return to the more traditional modes and frequencies of person-to-person interaction, just with their immune systems being less primed. Children and the aged would be at-risk subsequent to mass, extended isolation. The aged were already by far the most at-risk of death or debilitating symptoms of COVID so they were just super screwed.
I don't imagine there will be a real rollback of rescinding COVID restrictions anywhere. Maybe some cities will try, I'm sure people wearing masks is here to stay in plenty of urban areas and probably more of SE Asia. CPC tried, valiantly, and they did save a ton of lives during that initial outbreak. They could have rest on their laurels then and done basically nothing about Omicron, but they kept trying. At the end of the day though, a majority of people are healthy enough to be comfortable taking their chances. The odds they will be personally affected are pretty low. And they have the elbow room to be more cautious/isolate periodically when they know they'll be interacting with at-risk family in the near future. Everyone without that latitude is worse off.
The hypothesis of that flu season is worse bc of lack of what you describing doesn't really hold up. Most of the western world wasn't wasn't under stringent covid procedures last flu season. I think a more likely hypothesis is that on a population level immune systems were weakened by mass COVID infection we have seen with omicron/whatever the new hotness is.