I think of it this way (sorry for the long and somewhat circuitous response) - I am always striving to be a better person, be more kind, more compassionate, less judgmental, but I am an imperfect human being, I imagine we all think of ourselves as imperfect in this way. I also imagine there are some who are already the best person they can be in every instance; I bow in respect to those people, it is what I strive for.
When you're on the Camino, your life is stripped down to the bare essentials - walk, find food and lodging, rinse and repeat. Be good, do good, open your heart to beauty. The little frustrations we encounter along the way are an opportunity to practice equanimity and not pass judgment, and when we find ourselves getting frustrated, it's easier to see it and remind ourselves that getting angry, or impatient, or being judgmental is not our best selves. The trick is bringing it back to our day-to-day lives when we are back home.
As many people have noted in this forum, they feel like they are their "best selves" while on the Camino. To me, and I apologize for repeating this analogy which I've made in earlier posts, it's a little like the yoga practitioner feeling spiritual while on the mat, but then snapping at a clerk in a grocery store or some such similar "not nice" reaction - have you really absorbed the lessons you've learned (in your yoga practice, on your Camino) or is it just exercise? So maybe it's easier for the guru to be spiritual in the cave on the mountain, but we who practice yoga have to bring that into our daily lives while trying to deal with all the relevant frustrations.
So what I meant is that on the Camino we can get fooled into thinking we are living as our best selves, and frustrated when we return home, because sometimes it is easier in this simple stripped-down undertaking to help one another, be kind, be compassionate, but we have to bring that home and keep doing it even if it's harder. In that way, I was agreeing with
@JabbaPapa that it is a means to an end, to becoming a better person, because it gives us the chance to see ourselves in a new light and practice these things that bring out our best selves, and then bring it home to our daily lives. But if you never get off the Camino, you're like the guru living in the cave - that might be ok, but from my perspective not ideal.