Complaining About Naruto: I Filled up Your Luck

As a good young man in the 21st century, I traveled to the world of Naruto. The system asked me to add skill points, and I added all my luck points, so... I don't know ninjutsu, and I have very little chakra, but... Why can I touch Obito Uchiha even when I eat noodles? The Third Hokage accepted me as his disciple, and he could pick up the secret book of Eight Gate Dunjia as he walked?