What would make one "unable" in your eyes? I would say that many are unwilling not unable. If they ate not willing , then perhaps they are unable because the lack the grace necessary
He made no direct attempt to establish an institutional church anywhere or by any particular liturgy or doctrine.
Scripture appears to indicate that Jesus spoke with purpose .
Mat 7:28 And it came to pass, when Jesus had ended these sayings, the people were astonished at his doctrine:
Mar 11:18 And the scribes and chief priests heard [it], and sought how they might destroy him: for they feared him, because all the people was astonished at his doctrine.
Jesus was after all a Rabbi , a teacher, that taught in the Temple at times.
Jhn 7:16 Jesus answered them, and said, My doctrine is not mine, but his that sent me.
The apostles knew the import of passing on correct doctrine
1Ti 1:10 For whoremongers, for them that defile themselves with mankind, for menstealers, for liars, for perjured persons, and if there be any other thing that is contrary to sound doctrine;
I am afraid if we see Jesus as a wandering and aimless man that had had no doctrine , we present a flawed image of God made man .
2Jo 1:9 Whosoever transgresseth, and abideth not in the doctrine of Christ, hath not God. He that abideth in the doctrine of Christ, he hath both the Father and the Son.
If Ye have seen me YOU HAVE SEE THE FATHER that sent me.
I think we can all agree that the Father is the perfect model of organization
Wherever He woke on any given day He set out along the Way; speaking, teaching, healing and otherwise dealing with whomever He met as He traveled. He seemingly gave no thought most of the time to what direction He traveled, nor did He often seem to have any particular destination in mind.
I believe Jesus well knew His destination was Calvary and every step was ordained to bring him closer.
As shown in the Mar 11:18 quote above Jesus spoke at times and place that would lead to the crisis with the Jews and bring Him to the cross.
He could have come to heal Lazarus before he died...but He delayed coming so that He could display His power in a way that would be the catalyst that sealed His fate.
Even if my point concerning doctrine is moot, it still remains that He established no earthly church, let alone denominations or sects; His earthly ministry was the personification of the Two Great Commandments even while he purposely walked toward the Cross.