I suspect disinformation.
Remember, the first batches of J&J were sabotaged, distribution was suppressed, and it was later blocked from the market.
There was a conspiracy against J&J to force folks to mRNA, and it sounds like it may be ongoing. None of the Covid shots were safe, but J&J was the best of a bad deck.
I was a J&J person
I was told here recently that there was some mNRNA in the dose.
I dont know if it is true.
I was in one of the first problematic batches.