That's your personal belief that may or may not be representative of reality.
Another possible belief that one might have, that you can find evidence for in reality, is that side effects are being downplayed in order to push vaccine mandates through as a way of exerting political control and/or profits for certain organizations (e.g. Pfizer, which has done a lot of extremely questionable things in the past, like a lot of large pharma companies).
> the reasoning being most people need to hear a simple, straightforward and consistent message to be compliant.
...and this line only adds more evidence to the second belief, as it's exactly what entities wanting control want - people to be "compliant" for its own sake, regardless of reality, ethics, or reason.
In any case, downplaying the side effects is unethical and obviously wrong.