Milkin' the mileage; keeping the undercarriage while in flight; and re-armin'/re-fuelin' the me162 is in fact gaming the game at its best. To each his own, no doubt. but to argue that it "is not" and then to list the items you did seem a bit hypocritical, no?
No, not at all. Flying an aircraft within it's operational limits is not gaming the game.
Komet pilots would take off at about 320kph. Once climbing speed of 676 kph was reached the dolly would be dropped. Stay under that speed, and there would be no damage to the carriage.
It is not any more or less gamey than F4U's dropping landing gear or taking 30 seconds to rearm any plane.
If you are really looking for more realism, wear a flight suit whilst playing the game and , instead of going afk, just piss your pants.