Abilities like scry or surveil count as card selection because they let you manipulate your library to improve your future draws
Naturally this makes lands like Ancient Tomb, Serras Sanctum, and Nykthos, Shrine to Nyx prime tutor targets for a lot of white decks, but if youre trying to find missing colors of mana in multicolor decks, simply being able to snag a Raugrin Triome or Temple Garden can also make the difference between getting off the ground or getting mana screwed
We get a better body, too
They're inexpensive creatures that don't have a lot of power, but what they lack in strength, they make up for in numbers
Crew 1 (Tap any number of creatures you control with total power 1 or more: This Vehicle becomes an artifact creature until end of turn.) Magitek Infantry Rarity: Common TYPE: Artifact Creature SUBTYPE: Robot Soldier CMC: 1 Mana cost: USD: $0.07 EUR: 0.05 TIX: 0.03 EDHREC RANK: 25992 (1/1) This creature gets +1/+0 as long as you control another artifact
Normally in Limited your opportunity to take a Constructed power-level card may only come around once or twice per draft, but in a Cube draft this opportunity presents itself pretty much every time you look at a card