You use the word "paranoia," others might use the word "caution," and get tested.
So, the vaccinations are dubious, and the tests are dubious, according to you, right? At a certain point, I guess we all decide to believe what we will, but it's convenient to the doubters argument to doubt the efficacy of the science of everything. There are several different tests, and lab tests are better, because they are administered by professionals. Home testing can be more easily done wrong or contaminated. If there are symptoms, there should always be more than one home test, particularly if they come back negative. Also, testing too early is a thing. But one of my brother's is a bio-chemist in a Harvard medical lab, and he says the home tests are good. (With an obvious "yes" on the lab ones.)
Yes, my (other) brother had it once, completely asymptomatic...he tested because we were having a family get-together. 2 tests, both positive, so we called it off. 5 days later, still positive, still no symptoms. He was vaccinated. But he quarantined, to protect others. The full 10 days, because of the positive tests. He wouldn't have known if he hadn't tested for a specific reason. Which is why we vaccinate and mask.
I also believe it's here to stay, like cold and seasonal flu. But, while there is no cure for the common cold, there IS a vaccination against seasonal flu, which does a great deal to protect the very young, the very old and the immune-compromised. Likewise, the Covid vaccine, IMO, helps protect those who are more susceptible to having a bad and harmful case of it.
I'm with
@kskate2, in that I haven't had it, and I don't want to. You say we may not know we've had it. Like her, I get tested a lot for work. Also, as I have mentioned, I participated in a vaccine trial. I have been tested for antibodies, meaning that I had never had it early on, and the year that I was involved with the trial, they took my blood every 6 weeks, to check on my antibodies from the experimental vaccine, and they would have been required to tell me if I had Covid, or had had it at any point. That finished last March. During that time, I did actually get one cold. (Some selfish CU next Tuesday sitting behind me on a long bus ride, coughing and sneezing last Thanksgiving. Two negative home tests, and two lab tests from the trial, because they were so obsessed with my symptoms, and no covid.) Since late March, many tests for work and family gatherings, no symptoms, no covid. And I live in Manhattan. I live my life, I go out and see friends, but I observe protocols where they don't interfere with my enjoyment of friends. I live with no fear, but I have no problem being cautious, for the sake of others.
Not trying to sound virtuous, but just to say that there are ways to test, testing can work, there are ways to be cautious and still have a life. And, yes, there are still people that haven't had it. (Touching wood.)