I don't think that is a logical statement. Just something doesn't exist, does not prove that it can't exist. You need a stronger proof than that to show that in my opinion. At some point, you have to empower your users and trust them to do the right thing.
Let me expand the claim to include the caveats:
>The fact so many technical people believe that security and freedom are mutually exclusive [under current technological/financial/political constraints]
>At some point, you have to empower your users and trust them to do the right thing.
All I know is, my and my parents’ quality of life is far better after switching them to devices where they are not empowered.