Do you mean that one entity should have absolute power over Bitcoin protocol?

I'm glad that FOSS doesn't work that way. Face it or not, the fact is that anyone can make a fork of bitcoin code, anytime, with any parameters and features they wish and no one can stop that. If that fork is no good, no one will use it. It's that simple.

If it was as easy to "take over power" as you seem to think, then any malicious player could and would do it right now. The developers have no power over what software people choose to use.