1. Your bitcoin is right inside your pocket with your devices, no need to loby to get paid
2. You don't need to submit application, retirement documents
3. Bitcoin has no waiting season, anytime is your money
4. You don't need to struggle, fight and loby to process your retirement documents
5. When you WILLS or share your bitcoin to your children nobody will hear it
Actually all of your 5 points are similar to each other, you're talking about centralization. If you're working in a centralized company and your retirement will be paid in Bitcoin, do you think your Bitcoin will automatically arrive in your wallet? you're wrong because the company is controlling your Bitcoin, they can choose to not send your Bitcoin. This mean there's no difference between retirement paid in fiat or in Bitcoin.
6. Nobody will threatens or charm you for receiving retirement benefits from bitcoin since is not physical cash.
They can go into your house and threaten you with $5 wrench attack.
7. You decided when and how to withdraw or keep it your choice.
It's same like fiat.
The conclusion is I don't find any benefit between fiat or Bitcoin for retirement based on your 7 points.