When you start sideboarding out those enchantments, the following cards become weaker: Eidolon of Blossoms Kruphix's Insight Herald of the Pantheon Starfield of Nyx Sigil of the Empty Throne Rather than play "good" cards like Elspeth and Wingmate Roc, we have Sigil of the Empty Throne, Boon Satyr, and Suspension Fields because they happen to be enchantments
A number of the enchantments, like Aether Flash, Powerstone Minefield, and Lightmine Field, dont care who controls themBoros Reckoner and Truefire Captain can take the two or attack into the fields without problem unless Repercussion is also on the battlefield
Certain "bite" cards can typically see some amount of play, depending on their speed and their cost
Warhammer gives a hefty +3/0 , as well as trample and lifelink
Orzhov (black/white) decks are frequently built to tax your opponents, and Lotho, Corrupt Shirriff can bring some of that to this precon