I think there has to be a balance struck there between "taking certain precautions to avoid colds and flus" and "taking it so far that one is basically living in a bubble". Not insinuating that you're doing the latter, but I know some people who claim that they're going to wear a mask every flu season from now on.
Completely avoiding the flu may not be the great thing (for the population as a whole) as it sounds (although, I'm sure it's nice on an individual level)
This year's flu season was virtually nonexistent. That could be bad news for next year.
While the historically low levels of flu spared the country from what experts called a "twindemic"—a strong flu season hitting amid an ongoing Covid-19 outbreak—the pandemic's silver lining may come at a cost. According to Politico, the lack of a 2020-21 flu season means that scientists have little data to create effective vaccines in anticipation of the 2021-22 flu season.
Traditionally, to predict which flu strains will dominate the upcoming flu season, WHO convenes experts twice a year, once each for the Northern and Southern hemispheres, who examine data on flu strain spread collected by labs located around the world, including CDC.
During the meeting for the Northern Hemisphere, experts use data on what strains are affecting the Southern Hemisphere to predict which strains will hit the northern half of the globe a few months later. Then, an FDA advisory committee reviews those recommendations to decide how it will license flu vaccines for the coming year, Politico reports.
This year, the committee struggled to find any appropriate precedent. "What we asked … during that meeting was, 'Has there ever been a moment like this one?'" Paul Offit, a vaccine expert at the University of Pennsylvania and committee member, said. He added, "[T]his really is unprecedented."
A non existent flu season this past year means that we'll likely have a less-effective flu vaccine for the upcoming season, simply because the researchers won't know which strains to target with it. Attempts at complete avoidance of every single pathogen on the planet will lead to people having less effective immune systems overall, and scientists scratching their heads about which strains to target for the things we can somewhat mitigate for. The reason flu vaccines are as effective as they are, is because some people do get the flu, and that allows scientists to figure out which strains are spreading.