Eu acho que é porque Snarl é movido a energia solar e, portanto, pode não ser útil em missões espaciais. Essa foi a única desculpa que eu pude inventar que é digna de nerd.
His unique design makes Snarl particularly useful in sunny, arid environments. The large golden plates protruding from his spinal assembly are solar collectors. Although he can operate without sunlight, solar energy can increase his strength tenfold and his endurance to a virtually limitless degree. A swipe of his tail can shatter a 20-foot concrete cube. His heavily armored hide makes him resistant to most missile fire.
Snarl's dependency on sunlight makes him extremely vulnerable to attack at night. Although he can use the same fuel the other Autobots use, he operates at only a fraction of his strength when he does. He is also very slow and his uncooperative behavior patterns sometimes hinder his effectivess in dangerous situations.
- Wikipedia's page on him