Oh, so you're questioning the sanctity of interval workouts now? Look, I don't know what kind of alien life you've been living on the moon, but structured intervals are the bread and butter of any self-respecting Zwift racer's training regimen!
Sure, racing might be unpredictable, but that's precisely why you need to be prepared. You wouldn't show up to a gunfight with a butter knife, would you? No, you'd bring the biggest, baddest, most high-tech blaster you can find! And in the world of Zwift racing, that's interval training.
But hey, if you're content with getting blown out of the water every time you hit the starting line, then by all means, mix up your training with some "variable-intensity" rides. Just don't come crying to me when you're getting dropped like a hot potato.
And as for those "hidden benefits" of interval workouts, let me break it down for you: intervals build strength, improve power output, increase endurance, and help you recover faster. So unless you've got some secret sauce that's better than all that, I'd stick with the program.
Now, if you'll excuse me, I've got some wheelsets to compare. I hear the DT Swiss R1900 and Mavic Ksyrium Equipe are pretty snazzy, but the Reynolds Shadow 2011 is calling my name. After all, I've got a race to win!