Who wants to play a full game and manually record down each of the starting stats, each stat per level, NOT buy any items and NOT use runes for accuracy, doing work that riot claims to have already done, but for some reason wont tell anyone even after the champion is released.
No one wants to spend 6300 ip or worse actual money on a new champ only to find out it's not a champion they prefer, have no knowledge of the champ for 1st time play, making a bad experience, and a worse first impression of their new exciting champion they don't know anything about! It's not difficult to understand the conecpt of up to sate information in the learning center, thats what it is supposed ot be there for, thats why people spend money on new champs.