[1] https://en.wikipedia.org/wiki/Mzoli's [2] https://www.quora.com/Has-any-article-created-by-Jimmy-Wales... [3] https://en.wikipedia.org/w/index.php?title=Wikipedia:Article...
A line has to be drawn somewhere though. Storage may be cheap, but every article represents a maintenance burden in the long term. Hence the notability requirement. Why would a local investor/entrepreneur be notable to a global audience?
An in-depth article on your local ice cream parlour seems more at its place on a local blog, or on Wikivoyage under the 'Eat' header, or a book about your town; perhaps even a town-wiki!
Are those things really notable? I think you're overvaluing things that are only relevant to you. It sounds like what you should be doing is creating a wikia or mediawiki for your city, county, or state.
> their notability guidelines is mind bogglingly frustrating
Notability is a frequent point of contention. I don't think there's a good final way to solve it - people are interested in different things, and some things - e.g. local businesses - are notoriously grey area and prone to both abuse and over-zealous policing. I am sorry your experience was bad, but maybe try to contribute in some less controversial area? There are tons of areas - especially in translation space - where a lot of articles about completely non-controversial topic and very prominent things and people are under-covered.