Why does Fizz and Janna ignore unit collision while Katarina has to deal with this?

You ever seen Urgot try to walk between 3 minions?

Are you saying janna should dash around like katarina if she cant walk through units?

That is the flip side of what you are saying... a janna who can dash to allies, enemies, or minions.

That’s the point of Fizz. His passive IS to avoid collision...

Well for starters Fizz has no ranged poke. Second his major escape tool is basically 1 and done compared to Kat's spammable escape. Third, Janna is support she doesnt have the damage output of a Katarina. The clip you showed was them simply getting outplayed and taking stupd tower shots. Towers are suppose to be threatening and minion collision is something 99% of the Champions in this game have to deal with.

Urgot, Sion, Hecarim without E, Ornn, and a bunch of others can actually be pinned by minons, even on your own team