nope, i really have to win lane
I mean generally you are right if you go even when your team is ahead everything is good
But for some champions you HAVE TO win lane
It's do or die
Sion is heavily handicapped in that base stats department for example he CAN make up for it by farming
Now imagine getting zoned from level 3 onward
The best part is his damage vs minions is handicapped as well which means you have limited time to farm up because minions scale in health this means later on into the game it will take far too long to farm a minion wave. yay you farmed 50 health good for you enemy team has slain baron.
Also your damage falls of pretty hard past 20 minutes as does your reliability due to enemy mobility creep so if you didnt farm your hp you just hurt your team really badly
Sometimes you just have to win lane.
Just sad when riot forgot about this little nuance when they gutted sion's early game
And they didn't even accomplish Q max ( doh it's still way more unreliable)
So right now more so then ever if you mlsoe lane you lose game as sion (his pre 20 mins has sub 50% winrate :S)
He is not the only champion reliant on winning lane, many earlygame focused champions are, they need to get ahead stay ahead and close the game out ahead as part of their win condition
So it's not as simple as just going even in lane and you will be allright