digital spreadsheets - without macros - are arguably the simplest form of functional programming you could teach anyone, so i wouldn't be so quick to dismiss them.
Spreadsheets are immensely useful. In many situations they are more useful in specific tasks than software designed specifically for those tasks, because their general nature means that they can be used to do things beyond what the creator of the designed software intended.
People don’t use Excel for everything because they are masochists. Excel very often really is the best solution available for a very wide variety of uses.
Hope LibreOffice Impress improves over the time to catch up with PowerPoint.