Of the several different types of play, you're going to have those that want to have combat, be it furball, dogfighting, etc. And those that want to play win-the-war.
Those that want to fight for the sake of fighting are less likely to be averse to changing sides if that's what it takes to find a fight.
Those that play win-the-war are more likely ( my opinion based strictly from observance ) to claim loyalty to a chess piece, for that is their team. And you stick with your team. Your goal is to win the war. If you shoot down ( or worse, are shot down by ) somebody who, moments ago, was by your side, there is a sense of betrayal. That person is standing in your way of winning the war.
Those that want a fight for the sake of a fight may not be able to wrap their heads around that loyalty mentality.
Also, those that like to play win-the-war may have trouble comprehending how somebody can fight with no apparent impact other than personal accomplishment.
For the longest time I couldn't understand the tendency of one person that would fly out and then land 2 kills in an LA-7.. day after day, mission after mission. That's all they seem to be interested in doing. That opened my eyes a bit.
There are different cultures in AH. Be it GVs, win-the-war, furballing.. etc.
Don't judge.. just play.