I agree with the first statement but I'm not sure I agree to the second. In the past, piano transcriptions were often the only way for people to get to know certain music. These days everything is available, much of it for free, in splendid performances, and you can listen to any piece you want in your own time. I do not see why transcriptions should be such an important experience. Go for the real stuff ! Good as Liszt's Beethoven symphonies are, you would get a poor image of reality if you only listened to those without hearing the real thing. Transcriptions can be an added value, but they are seldom essential.