Why do we only get an option in the invoice template to BILL TO a company OR contact name? And not both?

I want to sometimes sync my Zoho CRM contacts to a company and invoice to the company. And sometimes I work with a single person with NO company, and want to invoice the person. 

It seems that if I sync Zoho CRM to Contacts, then I can't use a company name on the invoice.

or

if I sync Accounts and Their Contacts to Zoho CRM, then I can't add a single company-less person to an invoice.

Why can't I do both? Thank you.