Why would you even consider that being the chipleader ? lol
ICM considerations.
Risk vs. Reward.
Perhaps it's the second (or 3rd) largest stack that has re-raised us all-in... and perhaps there are a few fairly short stacks AND taking a hit vs. the 2nd (or 3rd) biggest stack leaves us with a very small stack (maybe smaller than a few short stacks on the table)?
How deep are stacks vs. size of blinds?
How much does our tourney ev potential increase from winning the pot, vs. how much it decreases by losing it? (ie. increasing from a 30 to 45bb stack, vs. going from 30 to 15bb... with other shorties on table)
What are the pay jumps?
What is the buyin... and what is the tournament?
Do we consider ourselves having an edge on the field?