Why idle neutral logic with a torque converter?

[MightyMirageMpg]

I had it in my '14 CVT Mirage and now in my '17 CVT. It works flawlessly every time. It could be that the CVT having a torque converter absorbs some of the delay during engagement.
Perhaps a more relaxed pace coupled with a judicial application of throttle will ease the transition.
If one cannot adjust their driving style to suit the vehicle they're in it's no fault of the vehicle itself.

This might sound silly but why does the cvt transmission have a torque converter and neutral idle logic?