In some senses this is similar to the Personal Best Bot feature request.
I understand that what you’re asking for is subtly different, but I’d say there are already ways in which you can compete against similar level riders.Just join an appropriate category in any of the many Zwift races (I note you say they don’t fall at appropriate times - but maybe you have some flexibility).
Surely it’s better to race against real people than computer controlled AI? Certainly it’d take a lot of programming to simulate anything remotely like a real person. Computers don’t get tired, for a start. =)