Yes, of course you are right, but it doesn't make sense with benign attacks, does it?
My Asryan Cleric can heal anyone (even enemies) except for my Angel of Light?
There have been plenty of "I can't water my plants" comments in other threads.
If you want to quote rules verbatim, read what it says about flyers attacking guarded conjurations. So do you follow what's written there?
What is the game's strength? Not its mechanics. We've seen parts of them before, in Summoner Wars and 4th Edition D&D and Magic and Chess and other games, although the sum is most definitely greater than its parts. Yes, its "choose your spell" mechanic is a stroke of genius (also its biggest barrier to entry as the choice overwhelms new players, especially if they hadn't built the book). But the reason why it is so much FUN is because you can envisage yourself right there, in the arena, like in a good RPG skirmish. It's a guilty pleasure, appealing to the child in all of us. And for it to retain that charm, the game must retain its "fantasy realism".
Hey, I'm a huge fan of Mage Wars (although I don't delude myself of its weaknesses). To not constructively criticise where deserved is to do the game a big disservice. At the risk of being flamed, nothing is perfect.
In Magic, protection from your own colour is a double-edged sword. You can't target it with your benign spells. But you also can't damage it via own global effects (Protection from Red and Inferno, Protection from Black and Pestilence etc). Good builds leverage that immunity. However Magic is not "fantasy realistic". It is primarily a game of leveraging mechanics. Whilst Mage Wars is more like a simulation.
Magic is more of a Eurogame. It's a cerebral challenge. Mage Wars is shameless Ameritrash (and better off for it, carving its own niche). It is about the experience and having FUN. Nobody wins when role-playing. Yes, winning in Mage Wars is just a bonus. Awesome game.
That is why, for this game, even an anal retentive rules stickler like me has become a big fan of "playing the game in the spirit of how it's supposed to be played".
Why destroy the immersive illusion when the rules unintentionally create an anomaly? Just House Rule it! Because you can be sure that Arcane Wonders don't want to destroy the illusion either.