> If you believe in good faith that you have not broken the law, and can reasonably convince a jury of that, you almost certainly will receive a lighter sentence than you would have otherwise

Juries usually don't decide sentencing, and even if they did I don't think that would matter with crimes viewed as wrong in themselves (mala in se) though it might with crimes viewed as wrong because they are prohibited (mala prohibita).

Well there's also the case that a main component in having your sentence reduced is expressing genuine remorse.

I'm not sure how on earth someone could be remorseful for a mala prohibitum victimless offense while simultaneously maintaining they in good faith thought they were following the law. Any expression of those two views simultaneously would in practice be seen as not much more than "sorry I got caught -- doing something I thought was legal."