Originally Posted by
Discoceris
This may be true now, but it wasn't the case in the first month. Essentially, unless you were a whale and/or the god/goddess of luck and fortune, you didn't have much choice but to grind up your 3★ girls alongside your freebie 4★, and maybe that one 5★ you claimed to be your waifu when it was the only 5★ anyway.
The dynamic of progression has changed now that the game has been out for a while, and new events are being released with regularity. However, some of the basic tents shouldn't be ignored, especially if you're really unlucky with pulls.