I will respectfully disagree with at least one point of evmori's claim.
The Scoutmaster has to sign off on the Eagle application. One thing that this indicates is that the Scoutmaster believes that all the requirements are complete. One of the requirements is to attach a statement of your ambition and life purpose. I think it's fair for a Scoutmaster to decide that the statement the Scout has given does not actually meet that requirement, and ask him to rewrite it.
Once the statement is above the minimum, then yes, I agree that the Scout can decide for himself how good it is and whether it should be made better. But Scouts by and large want people to actually listen to them and give them feedback and sometimes hold them to a better standard than "whatever you write down is fine."
And I do agree that it does not affect the question of the Scoutmaster conference.
I would agree that by the Scoutmaster putting his signature on the Eagle application he indicates all the requirements have been met. That signature doesn't mean he likes what the Scout wrote. Nor does he have to.
And yup packsaddle, you read correctly.