medical opinion advises that vaccines are not needed where strong natural immunity is present. Again, this is the fist vaccine that goes against this advice.
There is no strong natural immunity. This is a novel coronavirus; it has not been encountered before. There is no pre-existing immunity. The two routes through which an individual can contribute to herd immunity are a) take the vaccine, or b) catch the virus. There's no third route.
Of course that natural immunity exists - there is general non-specific immunity, which is used against new viruses. If something like this wouldn't exists, every new virus will exterminate whole mankind.
Let your body get rid of the pathogens by not wearing a mask
There is no medical reason to not wear a mask. By refusing to wear a mask, you contribute to the spread of the virus. By refusing also to have a vaccine, you contribute to the spread of the virus. You are actively encouraging the rise of new variants by increasing the chances of catching the virus and then infecting other people. By refusing to take the vaccine you are also working to prevent herd immunity, and so increasing the chances of this becoming endemic (although this now seems an inevitability in any case).
Of course there are many reasons. I have some specific medical issues, which gets much worse in wet environment and wearing masks get it worse. Psychological problems exists too (these are medical issues too). Wearing mask for a long time is not natural, because people just had to breath...
I wrote a post to you in another topic, but you didn't answer. Why do you blame anti-waxers, but don't agree with contribution of pro-waxers to other issues conjuctive with covid restrictions?