The control of core developers (or any developers) over the future of bitcoin is hugely exaggerated.
Devs can add new features to the existing software, but they cannot change the blockchain protocol.
Only miners can.
So you're talking to the wrong people.
No I am not.
Let me ask you this, then.
Let's say there is a cataclysm, or whatever and every single "code dev" (whichever criteria you use to tag them) dies...
What effect, in your opinion, would such an event have on the bitcoin as the currency?
The devs may write the code as much as they want, but if the miners won't like it, it will not be used. A nice example of this is SegWit code which is not accepted:
This guy thinks that Bitcoin is centrally planned by core devs, which is fairly stupid.