Anybody who has operated any technology would know that maintenance, improvement is required. Your laptop won't last your forever. They know devs are needed. The question is if they control the devs to do what they want. 

They can't control the 'Core Devs' hence they can't control Bitcoin and that is the real problem. 

Payment system is a no brainer. If you go to countries like East Timur, Cambodia, Laos, the currency is so shitty that locals can't afford local goods and are unable to contribute in even circulating local economy. The use cases can on and on. 

But those in "power" would spin the use cases so hard because they want control of bitcoin development. This is where it gets very dangerous and worrying.