There should not be a discussion of every point. The only discussion should be "oh let's talk about that impediment after the meeting with a smaller group of people" or "let me follow up with you after lunch".
The standup is 10-15 minutes. If it is longer, it needs to be stopped. Period. Non-negotiable.
Guess what? Those things are still meetings. They still take up actual time that could be spent on getting shit done.
Daily standup: 15 mins x 10 days = 150 minutes = 2.5 hours Backlog grooming: 0.5 - 1 hour Sprint planning: 0.5 - 1 hour Retrospective: 1 hour Demo: 1 hour
So about 5.5 - 6.5 hours of meetings over 2 weeks. If you're really militant, you can probably take it down to 4 hours, but I don't think you can get much lower than that without dispensing with formal Scrum.
It doesn't seem unreasonable to me to have 6.5 hours of meetings over 2 weeks.
