Financials and statistics are two very different animals.

In business usage, all your financial spreadsheets including forecasts will have a grand total of 0 statistical functions used; and your marketing/customer segmentation people, when a business starts to have them, will use some statistics but again, looking at your article (somehow not behind a paywall?) - there is zero overlap between the listed problems and with what those people will actually use.

Good analysis of customer behavior (instead of just financials) can use all kind of heavy stats, but it's done by different people and at an different company stage than the original article is talking about; if you're starting a company you simply won't be doing any of that until after a million of other things.