Not necessarily. Certainly no worse than vinyl records
Lets face it,. 100:1 difference (20dB) in channels is available with the meaneet of equipment. That puts the mage firmly at the edge of one loudspeaker. Most meaningful stereo is in the 2-3 times difference only.
ISTR that I could get around 40dB with a good chipset and reasonable signal; level - 10uv or so, certainly better than 30dB in the mid range, tailing off a bit above 4Khz..but there isn't a lot of info in the last two octaves anyway.
Its unusual to get more than 40db crosstalk rejection in a stereo amp anyway...especially at higher freqs where capacitative coupling across e.g. tone control wiring tends to screw things up.