Why pick reworked Cassiopeia?

So I just want to make a short thread about this because ever since the rework this question has been on my mind.

Why on earth should any player who wants to be competitive ever pick the reworked Cassiopeia over other champs? What value does she offer a team. I'm not asking this sarcastically I'm being dead serious. Why?

Her early game is abysmal at best, she is monotonous, she has mana issues in lane, she gets bullied by a massive array of other champions, she has no wave clear, shes easily gankable due to lack of an escape and fighting back while being ganked is pointless due to lack of damage, and her cc is laughable. Mid game is much of the same thing as early game except now her mana issues are lessened due to actually having a tear of the goddess, she still has basically no damage, and she still offers nothing to mid game team fights. Assuming the game hasn't ended due to your lack of influence early and mid game, late game she finally hits her power spike and has some DECENT damage, not extraordinary mind you but decent, though her range is laughable which forces her into danger just to deal damage, which makes it incredibly hard to function due to your lack of reasonable self peel or escapes leaving her vulnerable to cc and getting deleted late game even with proper positioning. Not to mention her damage itself is all very situational due to its reliance on first having to land a skillshot(her q) AND THEN having to follow up with her damage.(her e) Her damage just isn't reliable late game like an ADC who can just switch targets at the click of a button.

All of these things combined are what make me question why I should pick her over a different ap champion such as these that outclass Cass in almost every aspect.

Ahri: decent damage at all stages of the game, better cc, better mobility Azir: better sustained damage, better cc, better mobility Karthus: just as good sustained damage late game, game changing ultimate, actually useful early and mid game. Vladimir: similar range, just as good sustained damage, amazing AOE ultimate, amazing teamfighter, average/weak early, average mid game, strong late game. Better in almost every aspect. Ryze: better early game, better mid game, similar late game but also has innate tankiness he gains from items that also give him damage. Orianna: safer early game, amazingly better mid game, amazing late game, amazing damage cc and better self peel.

Like I'm just being honest. I tried to pick champions that had similar aspects to her(I tried not to add champions that were more of assassins rather than mages) and I know not all of these are exactly perfect examples but I feel like I have a valid question. Why should I pick Cass over ANYYYY of these champs. They outclass her in basically every way I can possibly imagine. Would like to hear what others thought about this because to be honest I'm at a loss, and yes I am a supporter of old Cass. I feel like she had aspects of her kit that made her unique, that made her strong and although she was a niche pick she still had her purpose.

bonus Old Cass: Strong early game, strong/average mid game, average/weak late game. Good aoe damage, good dots for applying rylais and liandries for killing tanks late game, had risky but also reasonably safe damage and good wave clear. Still vulnerable to ganks due to lack of mobility and range but could make up for it in early game damage and could some times turn a gank if played properly. Good outplay potential.