Keep in mind that in real life, pilots wanted to live. Sure, they had orders, and a mission to perform, but they also wanted to keep on living, and unlike in a game, they only had one life, and that's it.
When your actual, real, one life depends on how you fly your plane in combat, I bet you dollars to donuts you will fly differently than you do in the game, in a scenario or in the MA, either one.
The closest we get to that is the desire to keep playing in a scenario, so if you only get one life, if you want to keep playing, you'll be forced to be more conservative in your approach. If you don't care whether you play two minutes past the initial engagement, however, I guess you can fly as recklessly as you want.
ps: this is what killed me too easily in the first two or three frames of DGS. I didn't value my virtual life as much as I ought to have, and so I flew attack approaches on bombers that were riskier, and I paid the price for the folly.