I don't think everyone is equally sensitive to this. Just intonation sounds a bit different to me from equal temperament, but it doesn't sound disturbing. Likewise, although I have heard a lot of Indian classical music that is not in equal temperament, so I am pretty acclimated to it, when I hear Indian classical music played on equal temperament instruments it does not sound that bad. Some subtleties are definitely lost, and I prefer the non equal temperament tunings for that kind of music, but I do not find it disturbing.