So what? That's a total non sequitur. The measles vaccine is highly effective at preventing infection and transmission. That situation doesn't obtain with SARS-CoV-2. The vaccines are pretty good at preventing deaths but they have only a marginal and temporary effect on preventing infection and transmission. For the foreseeable future, every time you interact with another person (or certain other mammal species) there is a significant risk they will transmit the virus to you. That is our reality and wishful thinking won't change it.
Instead of trying to avoid infection and most likely failing, a more productive approach is to focus on reducing the risks of a bad outcome when you inevitably do get infected. For most people that means getting vaccinated plus resolving any major risk factor conditions such as obesity, type-2 diabetes, and hypovitaminosis D.
And you didn't answer the question. Which specific "experts" claim it will be possible to avoid infection?
Neither of those links support your claim. They don't state that it will be possible to avoid infection. Certain non-pharmaceutical interventions can potentially delay exposure for certain individuals, but unless you hide in a sterile bubble you will be exposed.
And the so-called "People's CDC" isn't even a serious scientific or medical group. Unlike the real CDC, they're not doing any original research or useful analysis. It's merely a political advocacy group. There's nothing wrong with political advocacy but don't confuse it with actual science.
