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That's fine, but why does it matter if you go for two at the end of the game rather than there? You go for two early and miss and you know how desperate you need to be. If you wait until your second score and miss, then you are still two points short and you had no knowledge of whether you needed to conserve time as much as possible or not.
I'd rather have the knowledge of what I need rather than feeling like I'm within a TD and conversion only to come up short on the conversion. At least missing on it early, I know I need to do what Philly tried, to take the FG as soon as possible and try to get the ball back for a Hail Mary.