You can't do opera when already from the 10th row you can only see little dolls on the stage. In such an enormous space you can't put much faith in the personal presence of the individual singer, which is reflected in facial expressions, among other things.
Which is why, in my lieder concerts, I always strove, when possible, to sing only the works of a single composer, so that the audience could be gradually drawn into a particular creative genius' way of thinking, and could follow him.
Within each individual young person you meet, you have the same fields to plow. The trick is just to wake thmem up, to sharpen their ears for what's already there in the music.
The composition of a single melody is born out of a bit of text, perhaps the first line, but it can also be the entire strophe; it can even be the poem's overall form.
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.
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.