I don't think people realize how important pick ban phase is
pick ban is not just to pick who you want to play as and who you dont want to play against. it tells you how to win the game. if the other team picks a bunch of late game champs and your team is a bunch of early/mid game champs pick and ban gives you your win condition. it lets you know right then and there to win you need to bully your lane then push down towers abusing your power spikes and end early. Because if you dont the other team will eventually outscale you and they will auto win unless they throw massively. you have people who dont pay attention to this aspect of picks and bans then the mid game goes great for them then suddenly the other team does really good and people rage about throws or "that champs op" when in reality they were ahead and just relaxed then their window of victory closed. their is allot more examples then just this but its the general idea
tl;dr: you learn your win condition in pick and ban you should pay attention to it and play to it
