Run a ln node. Open channels. Live the best life. 

 That is easier said than done, I'm afraid. But of course, you're right.

But running a node and opening channels is not only difficult, it also runs into the problem of blockspace scarcity... Nor everyone will be self-souvereign this way 

 Basically owning your own channel routings. There’s a few self-custodial alternatives that dont require running your own ln node. @ZEUS @PhoenixWallet 

 Self custodial users will be the kings of the future financial system, regularly exercising their sovereignty.

That means using their own policies, not anyone else's. 
That means capturing the long term value of infrastructure.
That means leveraging insights for precise management of their operations within the dynamic network.
That means managing relationships with other sovereigns.

Not everyone will be able to have the freedom of kings with their own UTXOs. 

 So if freedom is not for everyone, on what basis did you disqualify ecash?
I'm not too familiar with ecash, but the anonymity appeals to me...