In my country ~80% of the population took the vaccine and we still have many problems. Right now it's even the region with the highest vaccination rate that has the biggest wave.

It would've probably been much much worse without the vaccines, but they are sadly not a miraculous cure that solves all problems.

They absolutely help if everyone else gets vaccinated, which is what the person you’re replying to said.

No they won't because COVID spreads from vaccinated people too.

Also my point is there is no use to any vaccine if underlying health is not addressed in tandem.

I do not disagree with your point that the vaccine does not work on people who have an immundefect.

But that point was never in dispute, at least not in my comment.

Of course it would be great if the vaccine would also stop the transmission, but even if not, if less people get sick, less people will spread it, which will lead to smaller clusters.

It also allows the medical system to keep on working and providing the best medical help to people who do get sick.

Of course covid-19 is still an ongoing situation, viruses mutate, situations and recommendations change, but I don't see any indication that we can protect the population and even more the vulnerable population without a high enough vaccination rate.

Edit: Wording

You're approximately half as likely to get infected (and therefore become infectious) if you're vaccinated. Especially when the R0 is already hovering near 2, vaccines can mean the difference between COVID dying out in your area and COVID rampaging through the area, developing mutant strains as it goes. So your claim ("Vaccines won't help _at all_ if your immune system is completely compromised by other health issues.") is false.

You are making up statistics. The fact is that the only thing that protects the body _is_ the immune systems.

Vaccines do _not_ work on their own. They work _with_ the immune system.

Therefore, if the immune system is compromised (for _any_ reason) vaccines are worthless.