People will die because they don't take an effective vaccine. That's just a fact. We have an absolute mountain of evidence about the effectivess of vaccines. And the
downsides of people not taking vaccines. And the dangers of this virus. Because those consequences are literally lethal, people feel very strongly about it. Essentially, you don't have the right to go around killing someone else, even if you didn't mean to. And there's a point where rejecting a vaccine for this disease borders on that territory. It's only really defensible if you believe that "I'm not going to get covid anyway so I'm not harming myself or others" or "vaccines don't work". Anything else is people believing they are being cautious despite the contrary evidence, and in turn increasing the risk of exposing other people to their lack of caution. And those two views are not factual, at the end of the day.
The way we determine if the vaccines are effective is based on the trials that they have underwent looking at hundreds of thousands of people across the globe, and rigorous scientific assessment. It makes people feel more comfortable that their neighbour got it and they didn't get sick, but it isn't how we determine if they are proven. We know they are safe and effective, and we are just waiting for regulators to approve certain aspects of them. So if you claim that they are not proven, and you encourage other people through your words and acts not to get it, then you are indirectly endangering other people based on misinformation.
It's difficult to know what to do about that. I don't want to tell you how to live your life but there are certain things that you can't just look at and say "hey, it's his choice right". If someone decides to drive at 200mph down my street it is sort of a good thing that he has the freedom to do so, but it's mostly a bad thing because it greatly increases the risk of killing someone else exclusively due to his choice, and so I would actively try to prevent that from happening. His freedom is not limitless, not in law and not in accepted social norms.