Why play Zyra when I could just Neeko?

You could play Zyra, a champ that requires passive set up, and timing, and coordination between all her abilities, and keeping your passive seeds alive long enough to matter to actually make effective use of a set up for damage or crowd control.

Or you could play Neeko and just E+Q+R and do more damage than Zyra could hope to do in 3 seconds while also having the safety on W to run away if you somehow manage to screw up. She has a faster root with lower cooldown and less mana cost, fairly large circular AOE that can do almost double its damage on the minor condition that you don't miss(her Q), and double the damage potential on her Ult with a shield for safety and crowd control out the gate.