The non-professional language for this is "If we tell people the truth,

they'll want to hang us and all the politicians in bed with us!"
The public health watchdog has been accused of a “cover-up” after refusing to publish data that could link the Covid vaccine to excess deaths.

The UK Health Security Agency (UKHSA) argued that releasing the data would lead to the “distress or anger” of bereaved relatives if a link were to be discovered.

Public health officials also argued that publishing the data risked damaging the well-being and mental health of the families and friends of people who died.
...
UsForThem, a campaign group, requested that UKHSA release the data under freedom of information laws. But the agency refused, making a number of different arguments including that publishing the data “could lead to misinformation” that would “have an adverse impact on vaccine uptake” in the public.
Further translation: "If we give them this truth, they won't trust us to take whatever shots we direct!"

Gee, I wonder why.