Nigel, that’s one of the most absurd statements I’ve seen in a long time.

According to computerhope.com a CVS file is

“… a simple file format used to store tabular data, such as a spreadsheet or database. Files in the CSV format can be imported to and exported from programs that store data in tables, such as Microsoft Excel or OpenOffice Calc. CSV stands for "comma-separated values".Jan 24, 2018

Sorry guy, but a CSV file is nothing more than columns of ascii (or Unicode) text with the fields separated by commas.  In fact CSV files can be imported into most text editors and massaged there with no ramifications (( MS Word and it’s ilk are NOT text editors! ))