The drift into the too many BS laws and cop exemptions, with attending example, really has nothing to do with the op nor the current point we are discussing, please accept my apologies.
If it truly is your opinion that a criminal must prove that he will not commit a crime after release then some could demand that you prove that you will not commit a crime with your gun...daily.
The bottom line is that probation proves nothing and is a privilege, a promise not to commit crimes.
Serving the entire sentence means that the criminal must prove nothing and should not be required to prove anything. All of his rights must be restored without condition and if then commits a crime then hold him to account for that crime.
TJ once opined that he would rather suffer the inconveniences attending too much liberty...rather than too little degree of it.