"dissuade" does not mean "completely prevent forever in all circumstances"
Dissuade means something more like "reduce the chances of it happening".
If the OP had written "fines do not completely prevent forever the chances of a bad thing happening" everyone would have realised that was a nonsensical bar because even putting in jail doesn't do that.
Dissuade means something more like "reduce the chances of it happening".
If the OP had written "fines do not completely prevent forever the chances of a bad thing happening" everyone would have realised that was a nonsensical bar because even putting in jail doesn't do that.