The intent of Tiers is so that when you are in a draft and presented with a series of options you can pick any player from the tier and we project them to have the same/similar ceiling and same/similar floor as any other player in that tier, giving you more flexibility to build an optimal roster and get your guys.
Another way to look at it is that even though one player such as JuJu Smith Schuster, is ranked as our WR #28, and Rashod Bateman is our WR #23 they are still in the same tier (3A) and therefore we project all WRs in tier 3A to have a similar range of outcomes so depending on how your draft board unfolds you can feel confident picking any of the players in that tier and feel good about their projected performance in 2022.
This gives you more flexibility in stacking QBs with WRs, avoiding having too many players on matching bye weeks, enables you to get "your guys" (player bias), and helps you deal with in-draft sniping.
In-draft sniping is when your buddy who picks just before you or a few picks before you takes the guy you were planning on taking… I know it sucks BUT with Tiers, voila!
You just get another guy in that same tier. Last but not least this helps you not reach for players beyond where they are typically drafted, thus costing you valuable draft capital
Example: Why draft Gabriel Davis in Tier 3A at the end of the third round when you can get Amon-Ra St. Brown, also in Tier 3A towards the end of the 4th.
Therefore allowing you to spend your end of 3rd round pick on a RB like Travis Etienne, who is projected to have a better floor and equal ceiling as Gabe Davis this year (Etienne is in RB Tier 2C)