It doesn't seem silly to me. Many documents with a letterhead first page start the first page as page 1, even if not labeled. I would think that's the default in usage. Otherwise, depending on what's on your first page, creating a Section Break/Next Page would give you a fresh start. For our docs, we frequently have cover page, letter on letterhead, then page 2 if needed of letter as ii, table of contents as iii-iv, then restart numbering at 1 for the main document. We only use the Different First Page on the letterhead part; everything else is devised with section breaks.