Right. Institution. This is the obvious and very visible model. Especially visible when the organisation is as big as the Catholic Church. There are advantages. Any 'successful' institution will have clear branding, and a well developed constitution. Most commercial organisations even have 'mission statements' now!
So a lot of people will feel 'safe' with this model. They know what they have to do. I've heard people say the Church is like a club. If you don't like/keep the rules get out. I hasten to say this is not what I believe Jesus says to us. He welcomes sinners. In fact, the Catholic Church has been called The Church of Sinners.
But anyway, the institutional church has an unbroken tradition going back to the apostles. It is the Church who organised Scripture as we know it today,(different from the Hebrew Bible) and there is a long tradition of moral teaching easily accessible through Vatican documents.
However, there are disadvantages with large institutions. They become unwieldy, and slow to change, and they can become very paternalistic.
I think it was to protect the ordinary Christian that the Church condemned Galileo when he discovered the earth was round. His findings didn't seem to correlate with the creation story, which puts us at the centre physically.
The same thing is happening today. Psychology is a comparatively new science, and it has taken the Church a long time to afford Christian burials to people who commit suicide. Thank God we do now, but there are other areas that need updating.
Much of the moral teaching of the Church needs rethinking. For example, sex should be a life-giving experience, but an African with Aids, making love with his lawfully married wife, could be giving her death if he doesn't use a condom, but the Church still says artificial contraception methods are wrong.
I think the fact that church leaders are male celibates, and usually getting on in years, contributes to the problem.
However, I want to end on a positive note. The visible church gives us all the 'smells and bells' experiences that address our senses.
And all these liturgical traditions are very symbolic. It's just that we need to take time and remember.
For example, (as the Pope has been in the public eye in England recently) bishops with their mitres and crooks should remind us (and them) that they are shepherds of the people. It must be a difficult line to tread. We mustn't be sheep, following blindly, and they mustn't be too paternalistic.
Oh let's finish on a whimsical note. Shepherds in the time of Jesus, were outcasts, as they couldn't keep the strict rules (washing etc) that were laid down. That's why St Luke makes a point of saying the Good News was first announced to shepherds. Jesus came for sinners. we all in it together, pope and people. The Church of Sinners.