Particularly at around the age of 70 you reach a stage where you have to be very careful. If, at that point, you abandon the work you have been doing, there is a good chance that you will just collapse and drift.
Brahms believed that there was no need to publish absolutely everything that Schubert ever wrote.
Admittedly, it is really our duty, as artists, to hold up a mirror to our own era; but, on the other hand, these works have lives of their own, and they're still alive today.
Rather, I believe that it is very good, if, with the aid of his songs, we can be reminded, among other things, of the social conditions under which Schubert had to work.
When you go out onto the stage, all the preparation has to be forced into your subconscious. For the moment of the performance, we all have to return to a new level of unconsciousness. All the reflection and all the doubts have to be laid aside before you start.
In Romanticism, the main determinant is the mood, the atmosphere. And in that regard, you could also describe Schubert as a Romantic.