I think people don't even consider it because everyone plays the rubato hands-together.
Maybe because most people (everybody?) think it sounds un
Oh, it can, depending on the pianist. Like Rich said, people rarely nail it. If you still think it sounds unmusical when it's nailed, then you'd have probably been in the Berlioz camp regarding Chopin's own playing. (A relatively small camp, but you're welcome to it.
) I think it sounds incredibly unmusical when people play Chopin too straight, and I think hands-together rubato often sounds tacky, and disrupts the pulse of the music.
Can anyone imagine Brahms, Liszt, Scriabin, Debbusy or Rachmaninoff played this way?
Rachmaninoff did sometimes, IIRC. I will have to dig through some recordings later. Orchestras generally can't
do it, unless there is a soloist involved (and the opportunities for this are probably rare). Typically the conductor follows the soloist, but it doesn't necessary have to be that way. The distinction is probably the root of Berlioz's issues with Chopin's playing; conductors are accustomed to both rigid tempo and compulsory synchronicity.