Well thats exactly it - whats the point in a system of governance when we're only supposed to vote based on their ability to run the blockchain? That's like choosing a prime minister based on their ability to cut taxes. Like, great but what else? What am I voting for? The other guy said he'd cut taxes too but also said he supports education - so I'll vote for him instead.
I shouldn't need to understand how the blockchain works - I trust they can all equally do a fantastic job. What's making them irreplaceable that really matters to people like us?
If it doesn't matter then... forget the governance thing. Just lock it in place how they are now for all time until they decide themselves to move on.