Yes they are, when explaining why "it's spreading quickly now" does not imply that the vaccines aren't effective.
They are.
>> It is common knowledge by now, January 2022, that SARS-CoV-2 vaccines do not prevent transmission of SARS-CoV-2.
And when you stop spreading misinformation like this, I will stop correcting you.
> Most of Africa is unvaccinated
What relevance does this have to your false claim that the "vaccines do not prevent transmission"?
> > Transmission rates would be a lot higher without vaccines.
> That is not an argument for mandating vaccines
You are right that it is not. Fortunately, that is not the reasoning for vaccine mandates, but just a rebuttal of your misinformation, such as:
> they only prevent the spread of the currently dominant strains with a very low probability or maybe even not at all.
No, they do not prevent spread at "very low" probability. Omicron is just much, much more contagious, so even with pretty high probability of prevention the rate of spread is high. This is why comparing with older variants is helpful with understanding the current situation.
You are also making the mistake of thinking of the effectiveness as a completely independent variable. But it is not. Overall effectiveness rises as the vaccination rates increase, because vaccinated → vaccinated has a lower probability of transmission than vaccinated → unvaccinated or unvaccinated → vaccinated.
And since Omicron is so much more transmissible than Delta, never mind Alpha, getting to a higher vaccination rate is more important than ever in achieving the desired societal outcomes.
Furthermore, every sick person puts a stress on the health system. With Omicron being so incredibly contagious, the risk of overwhelming the health system rises, meaning that other people suffer when you become sick, even if you don't infect anyone.
> Actually I haven't heard of any good argument for that yet.
Then you're not paying attention.