Office 365 is too complicated!

At the moment, I can see 23 Apps under Office 365.

How can we train thousands of users to understand when to use which one?

In my opinion, we only need three apps, and Dynamics 365 should not be part of Office 365.

1. Synchronous communication: Online chatting service(Teams)
2. Asynchronous communication: Email(Outlook)
3. Information management: SharePoint

Most of those apps should join SharePoint. They are:

Calendar,Delve, Excel, Flow, Forms, OneDrive, OneNote, People, Planner, PowerBI, PowerApps, PowerPoint, Stream, Sway, Tasks, To-Do, Video, Word, Yammer

So, why it is so complicated? For more subscription fees?

https://www.office.com/apps?auth=2&home=1