Matrix may not be safe but is Wire going to be safe from Chat Control? Most likely no. So I don't see how trading one surveillance state for another will help.
When you're a EU company or a EU government it makes a difference if your supplier is subject to EU surveillance laws or UK surveillance laws. As far as I can tell it comes down to: - are you afraid of foreign espionage vs. - are you afraid of your own government
Now, if my government knows everything there is about me and one day decides to crack down on dissidents or hand them out to another foreign power as it was done in WW2 with the Jews in the Netherlands? Well, that is on another level.
We have be down this road before. It never ends well.
Maybe it's been too long and people forget. My grandparents lived through WW2, from what they told me, the capacity for humans to inflict pain and suffering on other humans knows no bounds.