You are already drowning in downvotes. Certainly managers are going to have to use office software. I do not think that using Microsoft Offce in school makes it any more likely that you will become a manager.
Most managers are really not that great at using Ofice and, what they know, they learned on the job. Learning to use PowerPoint is more about leaning how to present and communicate in general. A course on the software is not going to teach that and knowing how to use LibreOffice Impress gives you more than enough expertise. In terms of presentation, the marketing department typically dictates the look and feel. You just need to populate a template. None of the executives I know use anything advanced out of Microsoft Word. If you can “track changes”, you can collaborate on documents. Really the only application that managers are likely to have any specialist knowledge around is Excel. I will admit that knowing Excel specifically vs other spreadsheet applications is useful. Being able to do a VLOOKUP, a pivot table, or even just proper multi-sheet formulas is useful. Even just being able to format effectively can make a difference in how professionally you come across. Honestly though, the Internet is littered with $19 Excel courses. Take one.