You want to be playing stronger cards at that point in the game
However, its important to note that just being able to include location cards in your deck is going to have a massive impact on the deck building process, and will probably change many of the existing ratios of cards types that players have to juggle when building a competitive deck
As can be seen in the previous example, selecting the Detectives packet first can offer a lot of packets in the second choice
These tokens grow in power and toughness for every artifact you control, creating an exponential growth curve that can turn a small utility board into a lethal force within a few turns
Getting access to the full card list early gives you a head start in building your deck
Lands that tap for multiple mana like Ancient Tomb can come back untapped to accelerate your big plays, permanents like Gilded Drake that you traded away to an opponent let you ensnare another big creature, or you can simply retake something stolen by an Agent of Treachery