Some more lore information that is irrelevant to us:
1 - (This is kind of obvious and common in Xianxia) The difference between planets is not just in size, for comparison - the same strike from Tang Wei that destroyed an entire solar system would not be able to destroy a planet in the Celestial Realm.
2 - (This one is a little more surprising, but equally useless) Dao Children like Ruo are only guaranteed to reach the first level of Immortal, and even lose their luck and Karma advantages there. After that, they are just as talented as any idiot who got there.
Some more lore information, this is a little more relevant:
1 - Being a dual cultivator apparently does not result in a complete increase in power. Although it does make the individual harder to kill and more versatile. The individual cannot stack enhancements from different cultivation systems. For example, a character with Body 9 and Qi 10, their strongest attack would be a 10, not a 19... Honestly, I think this is more Nicky avoiding work... v( ̄ー ̄)v
2 - That story about the body TW made for the MC being just "very good but something any immortal could give him" was thrown out the window. Now, it's actually so good that the MC could reach the Divine without even cultivating Dao.
Edit: Just one clarification on the second point... "Could reach" is really just a possibility; the MC's true, unparalleled talent still lies with Dao. To the point that Nicky says that only the MC (with his physique) is truly "guaranteed to reach the divine."