Why does Shopify need the SSN of a corporate officer for tax purposes?

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Why is that Shopify requires an officer of a corporation SSN? The IRS has that data, when we supply you with the corporation TIN that information is available there. Please see below:

All EIN applications (mail, fax, electronic) must disclose the name and Taxpayer Identification Number (SSN, ITIN, or EIN) of the true principal officer, general partner, grantor, owner or trustor. This individual or entity, which the IRS will call the "responsible party," controls, manages, or directs the applicant entity and the disposition of its funds and assets. Unless the applicant is a government entity, the responsible party must be an individual (i.e., a natural person), not an entity. If there is more than one responsible party, the entity may list whichever party the entity wants the IRS to recognize as the responsible party. Additionally, entities must report any changes to the responsible party to the IRS within 60 days by using Form 8822-B, Change of Address or Responsible Party – BusinessPDF.