Because there isn't much about "card advantage" on the card at all
However, there are just as many towns as gates, with 23 total gates as of Final Fantasy
TL;DR: If someone tries to draw extra cards, they either end up discarding and drawing, or milling instead, so they never actually go up on cards
When used in combination correctly, these cards can be used to put the opponent in a serious holeone which might be an unsalvageable position
That are plenty of copies floating around but its place at the start of the entire card series keeps its price quite lofty
As far as strategy goes I would only use this card to attach energy cards to my other benched Pokemon, and I would only do this if my deck had a lot of other metal type Pokemon