Sure, its a lot harder to cast, but no ones going to play this outside of very specific decks
One of the risks of playing a bunch of mana production is that we'll have games where we'll draw tons of ramp but few finishers
Goblins in Magic are known for many things, primarily aggression (Frenzied Goblin), intriguing battle tactics (Goblin Diplomats, Goblin Balloon Brigade), and a wanton disregard for their own lives (Goblin Grenade)
Even better, you can hide away a pivotal wincon, where it'll be safe from discard effects
Its most commonly used to mill yourself and escape Thassa's Oracle for the win
You can run Benevolent Bodyguard or Vigilant Martyr out early to protect Teshar directly