You’re missing the point, not working at FB/Google/Microsoft/Yahoo!/Amazon/Apple doesn’t mean you aren’t a talented engineer, but the fact remains, having worked at one of those companies for several years or longer is a sure fire way to get recruiters to chase you. So not having any of those folks (which recruiters lust for) and yet being a “tech unicorn” is generally not a good sign.
I understood what you were replying too, just feel you focused to much on being literal with the “large majority”, hence my reply. Glad we agree on the other part, so cheers!