"I don't know how to use spread sheets properly."
No. He doesn't:
I will happily use a spreadsheet to compute the grades of my students, to estimate my retirement savings, to compute how much tax I paid last year but I will not use Microsoft Excel to run a bank or to compute the trajectory of the space shuttle.
What he is saying is: It is fine to use spreadsheets as spreadsheets.
But there are people who can't use statistical analysis tools who use spreadsheets instead.
People who can't program who use spreadsheets filled with little code snippets to do what a program should do.
And in general people who make a mess with spreadsheets getting results that are hard to audit.
In short, business majors should take statistics classes and learn mathlab, or opt out of it by signing a form promising never to publish any paper that deals with statistical analysis of market factors.