For a long time I have wanted to learn to sight-read piano music, and made a few a ttempts, but failed.
The most important reason for these failures, I think, is that I have no interest whatsoever in performing music1, whereas all the resources I have found for learning how to sight read (particularly teachers) are entirely focused around performance, and relegate sight-reading as a secondary aspect and/or by-product of learning to perform.
For example, I have attempted a couple of times to take lessons from piano teachers, with the express purpose of learning how to sight-read, but these teachers have not known how to address this aim without putting me through the standard sequence of learning a little repertoire, etc. As a result, I learn no sight-reading at all. (I guess I have too good finger-memory and/or too good an intuition for the music, so after a couple of rounds I no longer require the score.)
My goal to be able to play a piano piece, however intricate, at first sight, even if my lack of dexterity forces me to play it at an uneven/halting tempo, and/or in an utterly mechanical way.
How can I achieve this goal without embarking in training whose primary aim is performance (for an audience, however modest)?
Is there any learning method for sight-reading specially designed for the non-performer?
May there be a subpopulation of piano teachers (maybe subscribing to a particular philosophy of teaching the piano, or catering to a particular type of student) that may be more responsive than the norm to this non-standard objective?
1I want to sight-read for the same reason a non-actor who loves theater may want to learn to read: to have another way to approach and appreciate theater. My interest in sight-reading is as a tool, a "scope" to direct at music, to, literally, see it in a different way. Maybe even to compose.