Our educations system has been in decline for the last 20 years. Instead foreign money has combine with private interests to blast us with complete made up bullshit propaganda 24/7. Almost all of our major news sources are now owned or operated by MAGA donors, who care more about money than public well being. Basically, half this country is now too stupid to determine if the information they're viewing is corporate propaganda, or foreign government propaganda. Both are exploitative, and both want Americans sick because it's profitable to them. So despite having a president that publicly threw out our pandemic response killing more Americans than in all the wars we've ever faught in combined - 4 years later we reelected him. That's how bad the propaganda is here. Combined with poor education, we can no longer agree on how basic cause and effect works.
TL:DR - We're now too stupid and hopped up on propaganda to understand how preventing diseases works.