The Google suite of office programs is fine for basic functionality. If you want to write simple letters and documents, use basic spreadsheets and presentations, it will do the job ok. Probably suits the vast majority of home needs.
For anything that needs more than basic functionality, then you need MS. A couple of years ago you couldn’t even set Google docs to have a mix of both landscape and portrait pages in the same document. Using headings and styles is still very limited, cross references to tables virtually impossible. If you need to publish the document and/or render into a pdf, forget it. I couldn’t use it for essays for example as I needed to to references in a certain style.
So because most corporations use MS, it also has the advantage for home users. Because who wants to learn a new word processor to do a letter for your cycling club when you could get it looking right in Word in 5 minutes?