I think the cause is understood and it’s not being accepted for the reasons given at the link, where the presenter went to the Biden administration with worrying data and was told it just wasn’t politically correct to think that there was a problem.
https://www.youtube.com/watch?v=XMxuNvVgxlU
The problem, discussed in a different podcast by the same people, is the spike protein gets loose into the blood and whatever organ it attaches to is attacked by the body’s immune system. (The body causes swelling. This is like vaccine induced arthritis.)
You need to understand the people in these videos you post are just making things up.