On the absolute most basic level, sure. All captures have an RNG aspect. But aside from legends where the RNG still smacks you around, normal captures let you weaken pokemon, status them, and use better balls to greatly raise your chance of success (or even eliminate RNG altogether and make captures guaranteed). You can greatly minimize or eliminate luck with normal capture mechanics.
Safari Zone has none of that. You throw balls and pray the RNG is pleased with you. Or you throw rocks and still pray the RNG is not going to just make the pokemon run off.
~ Master of Electricity ~ Electro: 0518-6613-7620 - Pokemon White