Scrum is simple to understand but difficult to master

Why Scrum is easy to understand because:

1. It does not talk anything new. We are still talking about software development lifecycle phases.
2. We have clearly defined roles here with their responsibilities.
3. Simple to understand ceremonies.
4. Ceremonies have clear objectives defined.

 but it is difficult to master because:

1. Roles described do not follow as per the definition, 
2. Ceremonies are happening but are not productive, not timeboxed.
3. People still have difficulty in understanding the ceremonies
4. within Scrum we follow mini waterfall
5. Management do not value much on coaching and cultural change
6. People do not understand that it is lightweight 

so what must be done to master Scrum:

1. Deploy the RIGHT people in the roles defined.
2. Management should be committed to follow Scrum and they should get the coaching first.