I never see these kinds of comments when it's about an effects plugin... "Great reverb, too bad that it doesn't also contain a phaser, flanger, distortion, etc. That would make it a lot more versatile!"
Want to use a really versatile plugin, use/buy another one then.
It's probably an internet thing - if you can't complain about it not being a perfect emulation, complain that it's not like another synth.
