Yes I saw it! But it's about what you can BRING to interview! He/She cut the first sentence. But we talking about what is the reason to upload more not required documents.
If you open official document Document Check list N400 you can see
□ Documents referring to you and your spouse:
a. Tax returns, bank accounts, leases, mortgages, or birth certificates of children; OR b. Internal Revenue Service (IRS)-certified copies of the income tax forms that you both filed for the past 3 years;
OR c. An IRS tax return transcript for the last 3 years.
They don't need all that documents!