I'm not lacking anything relevant: Trump pardoned someone who turned his back on his sworn duty to obey the lawful order of a court, simply because the Trump worshippers needed a little nosh to keep their faith up.
Other than inflaming everyone other than the Trump faithful, what important policy goal has been materially advanced by his pardon?
Having lived in Arizona these past 18 years, I can confidently inform you that you've no idea what you are talking about. Arpaio was ordered to halt certain types of immigration checks on certain vehicle and other stops by a WILDLY left wing judge with a wildly left wing agenda...under the higher purview of the wildly left wing 9th circuit. Rather than turning his back on his duty, Arpaio continued to have officers run immigration checks on all stops...technically in violation of the judge's order. As such, he was charged with contempt...akin to say, Ghandi being arrested for selling salt without British taxation....doing the right thing in violation of the technicality of a bad law. That said, laws are laws and Arpaio was correctly tried for contempt...and correctly found guilty. Proving that a man who stands up to a bad law must be willing to face the punishment for doing what's right....as such...the President determined that the rightness of Arpaio's actions was greater than the necessity for imposing punishment on him for voiding bad law. As such, and also considering the strong past service and age of the Sheriff, he justly granted a pardon.
The purpose is clear with this pardon...that a legal standard imposed by a wildly left wing court can and should be overturned in a "legal" manner by a president who is constitutionally empowered to do so. He also makes the point...again...that we are a nation of laws AND that we are a nation with a right to establish and maintain our own border/immigration enforcement. All strongly conservative values...so which of these are you opposing?