As a supporter I'm not interested where my target is. That's not my job/concern.
I'm supposed to heal and support and not watch a beautifull landscape therefor it's easiere to target with the little blue arrow cause I'll stop right there where my spell should land regardless of where my target is right now (left, right, in front or in my back and that's what you can't do with the other arrow)

And I didn't read it incorrectly - to get personel - you blame the game for the fact that it didn't match your playstyle. But the game is out there for years and you'r still not adepted?

And again - there are severeal workarounds that work even better than direct targeting.