I wouldn't be surprised if I heard the same rhetoric out of the CCP's mouth with respect to the current protestors
First, the reason people in the west lift lockdown has absolutely nothing to do with mrna vaccines, but with the fact that since omicron variant, covid is one or two orders of magnitudes less lethal than before, which means actually something close to the flu or less (for real this time).
Second, i have no idea how you got the idea that we were quick at adapting vaccines for variants. The 2021 vaccines were based of covid 19 variant, and were the ones used up to the third shot, in the late 2021 / beginning 2022, at least here in france. I’m not even sure what people are using now for the vaccine, as i don’t know anyone who took a shot since omicron.
Finally, trying to conflate fringe people believing in crazy theories with all the other good reasons for protesting against 2021 lockdowns or vaccine status pass, or health workers being fired (which, imho were completely legitimate causes), is a tactic used by governments to mute contrarian opinions.
Pretty much like what the chinese regime is doing right now.