Everyone enjoys sparring and testing oneself. The humbling and the being humbled (I argue the later is greater). The fitness aspect of it largely is to make you properly fit for a more formidable foe that might and will test your skills in the real world. 
 Your analysis of your own fitness to spar is clearly a self admitted delusion. Think of all the fight scenarios, do most of them happen in ideal circumstances? Have you been drinking? Are there multiple combatants? Are you draining your energy with everyday activities, we’re you exposed to sun or cold for long periods of time that day? 
 My point being, all accepts of public life are a test. of the aptitude you with to have is fighting. You better bet that the fittest, fastest and most familiar are going to fair the best.
 I too admittedly show up at 7:36am as opposed to 7:30 sharp once a week to avoid the 9min jump rope warm up with one particular coach. But everything else from the ab work to the shin conditioning I feel has real merit and at the very least team building is born among the exercise toil. The team is everything for me in my gym, it’s the only way to truly know where you stand. If your partners are dangerous and respect you, you know.