I'm not implying shit, I literally said why that doesn't really matter. But let me spell it out for you in more detail.
If you put Old Kaalia in the 99 then the only way to get reliable usage from her EtB is filling your deck with cards cheap enough to actually cast, which are usually gonna be not great cards.
If you put her in the 99 for Kaalia the Vast then you're telegraphing your threats and drawing even more hate than normal, because the core issue with Kaalia decks is that you can't actually hardcast most of your stuff until you're already behind.
And if you're building a deck with a bunch of Blink effects, you get to see those fuckers go right to the bottom of your deck each time you cast her. By trying to maximize your ability to fetch more dudes you weaken your ability to cast more dudes by making it harder to reduce their costs.
Kaalia the Skips Back Day simply isn't an impressive card. "When ~ EtBs, draw 0-3 cards chosen mostly at random and reveal those cards" is not impressive. Doubly so when compared to Kaalia the Gym Rat, whose entire thing is that she gets around the weaknesses of the archetype you use her for.