I see your point. Steem Power's only source of profit is captical gains, if you don't want to be active.
However, people that want passive income can still 'invest' in SteemDollar which even pay some interest over time. The SteemDollar is as good as bitcoin except for its speculative nature which is an advantage if you want to use it as an actual currency. For store of value, you may actually want to buy something that is less speculative in nature as bitcoin, but that's a decision for everyone to make on their own and derails the discussion.
Even if everything "collapsed", the network would still go on and pay content creators more than they would have received on any other platform. The only case when the system fails is when the price hits 0 which is as probable as bitcoin being worthless.
Oh .. by the way, the dilution of Bitcoin is still higher than the dilution of SteemPower.