You're not an American, so maybe you aren't aware how widespread conspiracy theories are in the US and how much they influence the public discourse. As a trivial example, the American Senate is currently interviewing the nominee for the head of Health and Human Services, which oversees the NIH, CDC, and FDA, among other agencies.
The nominee, Robert F Kennedy Jr, has been very outspoken in his opinions, some of which are:
Wi-Fi causes cancer and "leaky brain"
Chemicals in the water supply could turn children transgender
Antidepressants are to blame for school shootings
AIDS is not be caused by HIV
the Covid is designed to target white and black people but not Ashkenazi Jews
This nominee will likely be approved. These opinions are shared by a significant body of people who voted for the president who nominated him.