My "pay the bills" job is a Financial Analyst, but my passion for the past 5+ years has been my startup. I've learned so many different skills running my own business from project management, SEO, sales, advertising, growth strategies, programming, localization, etc. but if my startup fails would companies hire / be interested in me for the knowledge I've acquired? I feel I am very knowledgeable in all different aspects of online startups, and can be very helpful to other companies; however, I also get the feeling that businesses would see my failure in my startup as a flaw.
I totally recognize myself in your description. You can read the article I've written on Linkedin https://www.linkedin.com/pulse/my-5-mistakes-entrepreneur-coming-from-corporate-serena-de-maio
People learn from mistakes + building a company teaches so much that only fools will treat it as a negative on your CV.
And you don't want to work for / with fools, do you ;) ?