However, relatively speaking, a degree of effort along the path is needed before one is ready to go beyond it.
Only because everyone already has a path he follows with effort.
Understanding conceptually that one is Buddha is not the same as realizing it directly through practice.
There is really no difference between understanding and realizing.
If you think that you are a Buddha, then you are not.
You always are a Buddha. The problem lies not in thinking this or that, but in dualistic perspective, which comes from ignorance about your own being. Ignorance, we hear it a lot, but what does it really mean? When you look closely, disregarding content, you will notice that every experience implies one thing, your presence. "I am", as a sound in your head, does not differ in this aspect from anything else. Everything is, and always will be, a way of implying your presence.
There is this koan, which points to it, without directly revealing it:
"Bring me the essence of the temple bell sound."
There are practices leading to this realization, but they are often mistaken for the realization itself. If you think that not thinking about anything is It, then It is destroyed by thinking. If you think it's somewhere out there, you are tricked into chasing a ghost. But if you realize that everything is there just to manifest your being, duality is nowhere to be found. Since everything has one and the same purpose, your presence, there is nothing special to chase after. This is why path is faulty, because it created duality.
Here is a piece of Dzogchen text, which talks about It directly:
"I determine all events and meanings.
Because no objects exist which are not me,
You are beyond perspective or meditation.
You are beyond charismatic activity to be sought.
Because there is no state other than me,
You are beyond stages to cultivate.
[...]
Because there is nowhere to go apart from me,
One is beyond paths to traverse.
Because all buddhas, sentient beings, appearances,
Existence, environments and inhabitants
Arise from the quintessential state of pure and total presence,
One is beyond duality.
Because self-arising pristine awareness is already established,
One is beyond justifying it; the transmission of the great
teaching provides a direct entry into understanding.
Because all phenomena do not exist apart from me,
One is beyond duality, I fashion everything."
-Longchenpa
(Spoiler alert)
You are the essence of the temple bell sound.