In Rick and Morty, obviously a lot of logic is pushed aside purely for its fun and humor value. But some stuff doesn't make any logical sense for the smartest man in the universe.
In this instance, in "The Ricks Must be Crazy," Rick creates a tiny universe to power his car battery. A literal universe, and he sped up time to make a people sentient to serve as his powers source. Seen here:
This poses the issue, though: if Rick could create a micro universe.... not planet, not galaxy, but actual universe .... why instead, of using the somewhat conditional power of a planet of tiny people, didn't he just harness the near unlimited power of a micro sun? If it's an entire freaking universe in a box, it's not like he'd ever simply "run out" of power, and he's likely smart enough to create fail-safes to regulate the energy.
Was his reasoning for this ever addressed in continuity, or is my reasoning off for questioning his reasoning?